JP3871096B2 - Combined integrated heat exchanger of evaporator, absorber and subcooler, and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The invention of the present application relates to a combined heat exchanger of an evaporator, an absorber and a supercooler used in an absorption refrigerator.And itsWith regard to the manufacturing method, a combination-integrated heat exchanger of an evaporator, an absorber and a supercooler that is particularly excellent in heat exchange performance and can be downsized in structureAnd the heat exchangerThe present invention relates to a manufacturing method that is inexpensive and provides high quality.
[0002]
[Prior Art, Problems to be Solved by the Invention]
  Absorption evaporators, absorbers, subcoolers, etc. of absorption chillers have been conventionally constituted by tube heat exchangers, and these tube heat exchangers are often used for single-bore or twin-bottle absorption chillers. It is installed inside the fuselage or independently outside the fuselage, and is connected to each other by a passage in the fuselage or by piping.
[0003]
  For this reason, in manufacturing the absorption refrigerator, after separately manufacturing each heat exchanger such as an evaporator, an absorber, a supercooler, etc., these are individually attached to the inside of the fuselage or outside the fuselage, fixed, A lot of additional work is required, such as installing the necessary piping and attaching partition plates, and it takes time and effort to manufacture and assemble these heat exchangers, and in turn to manufacture the heat exchanger part of the absorption refrigerator. In addition, there have been problems such as an increase in size and complexity of the structure.
[0004]
  In order to solve these problems, the present applicant has previously filed a patent application on the invention of an integrated heat exchanger combined with an evaporator, an absorber and a subcooler as described below (Japanese Patent Application). Hei 9-34963).
[0005]
  That is, according to the present invention, the evaporator, the absorber, and the supercooler are each constituted by a multi-plate heat exchanger, and the multi-plate heat exchanger has two plate-like bodies each having an uneven surface. A plurality of elements formed by superimposing each other, a space for passing one heat transfer medium through the space inside each element, and a path for allowing the other heat transfer medium to pass through the space between each element The supercooler is formed integrally with the upper part of the evaporator or absorber, and the absorber and the integrally formed evaporator and subcooler are separated by a partition plate. It is a multi-plate heat exchanger combined with an evaporator, an absorber and a supercooler, characterized in that they are separated and accommodated in a casing, and are assembled together and then brazed.
[0006]
  According to the above-mentioned present invention, while it is possible to solve the above-mentioned problems to a degree that can be sufficiently satisfied, it cannot be said that the recovery of the heat held by the evaporating refrigerant (refrigerant vapor) generated in the evaporator is still sufficient. Since the temperature of the condensed refrigerant exiting the supercooler does not fall sufficiently, the cooling performance of brine and the absorption performance of evaporative refrigerant are not sufficiently satisfactory, and there are still points to be improved.
[0007]
  In addition, a wasteful space is created in the upper part of the evaporator or absorber on the side where the supercooler is not connected to the upper part, and the structure of the heat exchanger has increased in size. There was room left.
[0008]
  Therefore, as a combined integral heat exchanger of an evaporator, an absorber, and a supercooler that can solve these problems, the casing of the heat exchanger is composed of two casing parts, and the two casing parts are arranged at the upper side. Communicated through the communication port, separated by a heat-insulating gap below the communication port, and an evaporator is accommodated in one casing part of the two casing parts. An absorber is housed in the other casing part, and a supercooler is disposed horizontally so as to cross the communication port and straddle the upper part of the evaporator and the upper part of the absorber. Things can be considered.
[0009]
  The combined-integrated heat exchanger of the evaporator, the absorber and the supercooler having such a structure solves the above-mentioned problems, improves the heat exchange performance, reduces the size of the structure, and consequently the performance of the absorption refrigerator. It is possible to improve the coefficient and further reduce the size of the structure.
[0010]
  The invention of the present application is a combination-integrated heat exchanger composed of an evaporator, an absorber, and a supercooler having such an excellent effect.And the heat exchangerIt is an object of the present invention to provide a manufacturing method that is inexpensive and provides high quality.
[0011]
[Means for solving the problems and effects]
  The invention of the present application is an integrated heat exchanger combining an evaporator, an absorber, and a supercooler that solves the above-described problems.And itsThe invention described in claim 1 relates to a manufacturing method, wherein the casing of the combined heat exchanger comprises two casing parts, and the two casing parts communicate with each other via an upper communication port. The evaporator is housed in one casing part of the two casing parts and is separated from the other casing part of the two casing parts by a heat insulating gap below the communication port. Of the evaporator, the absorber, and the supercooler disposed horizontally so as to extend across the communication port and across the upper part of the evaporator and the upper part of the absorber. In the manufacturing method of the combined heat exchanger,(1)-(5)It is a manufacturing method of an integrated heat exchanger combined with an evaporator, an absorber and a supercooler, characterized by comprising the steps of:
(1)Two kinds each of a tank constituting each of the two casing portions and a plate that covers the opening of the tank are prepared, and the communication opening is formed at one side of each plate.
(2)A first assembly in which the plate, which is a component of the one casing part, and the core part of the evaporator are integrated by brazing;
  A second assembly in which the plate which is a component of the other casing part and the core part of the absorber are integrated by brazing;
  A third assembly in which required pipes such as a condensed refrigerant spray pipe are integrally fixed to the tank, which is a component of the one casing part, by brazing;
  A fourth assembly in which required pipes such as a concentrated absorbent spray pipe and a rare absorbent outlet pipe are integrally fixed to the tank, which is a component of the other casing part, by brazing;
  A fifth assembly is prepared in which the supercooler is constituted by a flat heat exchanger assembled integrally by brazing.
(3)The plates of the first assembly and the second assembly are brought to face each other, and the two assemblies are assembled and fixed together by brazing.
(4)The fifth assembly is a process.(3)The integrated assembly type heat exchanger is temporarily installed by placing the remaining third assembly and the fourth assembly together so as to cross the communication openings formed in the plates in the integrated assembly. Assemble.
(5)Process(4)The abutting portions between the assemblies in the temporary assembly are TIG welded except for the brazed portion.
[0012]
  The invention described in claim 1 is configured as described above, and the combined integral heat exchanger of 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, and the two casing parts communicate with each other through an upper communication port, and are separated by a heat insulating gap below the communication port. An evaporator is accommodated in one casing part of the casing parts, an absorber is accommodated in the other casing part of the two casing parts, and a supercooler crosses the communication port, and It is arranged horizontally so as to straddle the upper part of the evaporator and the upper part of the absorber.
[0013]
  As a result, a sufficient heat transfer area of the supercooler can be obtained, and the condensed refrigerant flowing in the supercooler and the evaporative refrigerant generated in the evaporator exchange heat in an orthogonal counterflow type. The heat-insulating gap below the communication port prevents heat transfer between the evaporator and the absorber, improving the heat exchange performance in each heat exchanger section and cooling the brine in the evaporator. While performance improves, absorption of the evaporative refrigerant in an absorber is accelerated | stimulated and the coefficient of performance of an absorption refrigerator improves.
[0014]
  In addition, there is no empty space in the space area above the evaporator and the absorber, the space efficiency is improved, and the structure of the combined heat exchanger combined with the evaporator, the absorber and the supercooler is further downsized. As a result, the structure of the absorption refrigerator can be further reduced.
[0015]
  In addition, the supercooler disposed horizontally so as to cross the communication port of the two casing parts and straddle the upper part of the evaporator and the upper part of the absorber functions as an eliminator. The droplets contained in the generated evaporative refrigerant are separated to prevent the evaporative refrigerant from exiting the evaporator with the droplets, and the absorbing liquid sprayed in the absorber evaporates due to the rebound. Prevents contamination on the container side.
[0016]
  Furthermore, the manufacturing method of the combined integral heat exchanger of the evaporator, the absorber, and the supercooler that exhibits various effects as described above is configured by the steps (1) to (5). As a result, after preparing the first assembly to the fifth assembly manufactured using the brazing means, the first assembly and the second assembly are fixed and assembled together by brazing, Assembling the remaining third to fifth assemblies to the integrated assembly, temporarily assembling the combined heat exchanger, and TIG welding the contact portion (excluding the brazed portion). As a result, it is possible to manufacture a combination-integrated heat exchanger of an evaporator, an absorber, and a supercooler at once, so that productivity can be improved and manufacturing cost can be reduced.
[0017]
  In addition, the main parts constituting the combined heat exchanger of the evaporator, the absorber and the supercooler are integrated into five assemblies, and after these five assemblies are manufactured, these five assemblies are combined. Since the final product is finished, the rate of occurrence of defective products is extremely small and robust, and a high quality evaporator / absorber / supercooler combined integrated heat exchanger is obtained.
[0018]
  Furthermore, by configuring the invention according to claim 1 as described in claim 2, the evaporator and the absorber are constituted by a multi-plate heat exchanger, and the subcooler is a fin-and-tube heat exchanger. Since it is constituted by an exchanger, these individual heat exchangers can be easily manufactured using brazing means.
[0019]
The invention described in claim 3 is a combination-integrated heat exchanger of an evaporator, an absorber and a supercooler, wherein the casing of the heat exchanger is composed of two casing parts, and the two casing parts Are connected to each other through a heat insulating gap below the communication port, and an evaporator is accommodated in one casing part of the two casing parts, of the two casing parts. The other casing portion of the housing accommodates the absorber, and the supercooler is disposed horizontally so as to cross the communication port and straddle the upper portion of the evaporator and the upper portion of the absorber. Is an integrated heat exchanger combining an evaporator, an absorber and a supercooler.
[0020]
Since the invention described in claim 3 is configured as described above, the casing of the heat exchanger includes two casing parts, and these two casing parts are communicated with each other via an upper communication port. A supercooler is disposed laterally across the communication port and across the upper part of the evaporator and the upper part of the absorber, separated by a heat insulating gap below the communication port.
[0021]
As a result, it becomes possible to take a sufficient heat transfer area of the subcooler, and heat exchange between the condensed refrigerant flowing inside the subcooler and the evaporated refrigerant generated in the evaporator is sufficiently performed. As a result, the heat exchange performance is improved and the temperature of the condensed refrigerant at the outlet of the subcooler can be reduced, so that the cooling performance of the brine in the evaporator is improved and the absorption of the evaporated refrigerant in the absorber is promoted and absorbed. The coefficient of performance of the refrigerator is improved.
[0022]
In addition, since the two casing parts are separated by a heat insulating gap below the communication port, there is no heat transfer between the evaporator and the absorber, and the cooling performance of the brine in the evaporator And the absorption efficiency of the evaporative refrigerant in an absorber can be maintained favorable.
[0023]
In addition, there is no empty space in the space area above the evaporator and the absorber, the space efficiency is improved, and further downsizing of the combined heat exchanger combined with the evaporator, the absorber and the subcooler is achieved. As a result, the structure of the absorption refrigerator can be further reduced.
[0024]
Further, the supercooler disposed horizontally so as to cross the communication port of the two casing parts and straddle the upper part of the evaporator and the upper part of the absorber has a function as an eliminator. The droplets contained in the generated evaporative refrigerant are separated to prevent the evaporative refrigerant from exiting the evaporator with the droplets, and the absorbing liquid sprayed in the absorber evaporates due to the rebound. Prevents contamination on the container side.
[0025]
Further, by configuring the invention according to claim 3 as described in claim 4, the supercooler is supported by the lower edge of the communication port of the two casing parts, so that the supercooler can be easily attached. And become robust.
[0026]
Further, by configuring the invention according to claim 3 or claim 4 as described in claim 5, the supercooler includes a condensed refrigerant flowing in the supercooler and an evaporated refrigerant generated in the evaporator. Are arranged so as to perform heat exchange in a cross-counter flow type, so that heat exchange between these two fluids is performed more sufficiently, heat exchange performance is further improved, and cooling performance of brine in the evaporator Further, the absorption efficiency of the evaporative refrigerant in the absorber, and consequently the coefficient of performance of the absorption refrigerator, is further improved.
[0027]
Further, by configuring the invention according to any one of claims 3 to 5 as described in claim 6, since the evaporator and the absorber are configured by a multi-plate heat exchanger, These individual heat exchangers can be easily manufactured and assembled to the casing by means such as attaching.
0028]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, an embodiment of the invention described in claim 1 and claim 2 of the present application illustrated in FIGS. 1 to 18 will be described.
  FIG. 1 is a front view of a heat exchanger combined with an evaporator, an absorber, and a supercooler according to the present embodiment, with the front cover portion cut away, and FIG. 2 is cut along the line II-II in FIG. 3 is a sectional view taken along line III-III in FIG. 1, FIG. 4 is a sectional view taken along line IV-IV in FIG. 1, and FIG. 5 is a partially enlarged view of FIG. 6 is a longitudinal sectional view of a tank which is a component of one casing part constituting the casing of the combined 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, FIG. 9 is a longitudinal sectional view of a plate that is a component of the casing portion on the same side, FIG. 10 is a right side view of FIG. 9, and FIG. A longitudinal sectional view of a tank which is a component of the other casing part constituting the casing of the body heat exchanger, 11 is a left side view of FIG. 11, FIG. 13 is a cross-sectional view taken along line XIII-XIII of FIG. 11, FIG. 14 is a longitudinal cross-sectional view of a plate that is a component of the other casing portion, and FIG. 14 is a left side view of FIG. 14, FIG. 16 is a diagram showing one manufacturing process of the combination-integrated heat exchanger of FIG. 1, FIG. 17 is a diagram showing another manufacturing process, and FIG. 18 is a part of FIG. It is an enlarged view and is a figure which shows the joining state by TIG welding.
0029]
  As shown in FIGS. 1 to 4, the combined integral heat exchanger 1 of the evaporator, the absorber and the supercooler in this embodiment has a casing 2 composed of two casing parts 3 and 4. These two casing portions 3 and 4 are communicated via rectangular openings (upper communication ports) 3c and 4c formed in upper portions of plates 3b and 4b, which will be described later, and below the rectangular openings 3c and 4c. They are separated by an insulating gap B.
0030]
  The two casing parts 3 and 4 actually comprise a combination of tanks 3a and 4a and preferred plates 3b and 4b that cover the openings of these tanks 3a and 4a, respectively.
0031]
  The tanks 3a and 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. 6 to 8 and FIGS.
0032]
  The plates 3b and 4b have substantially the same shape and the same size, and are formed by pressing. In FIG. 1, in the direction orthogonal to the upper paper surface, FIG. 5, FIG. 9, FIG. And as better illustrated in FIG. 15, elongated rectangular openings 3c, 4c are formed. 9, 10, 14 and 15 show the detailed structures of the plates 3b and 4b, respectively.
0033]
  An upright piece 3d is bent at the inner peripheral edge of the opening 3c, and the upright piece 3d is just fitted to the inner peripheral edge of the opening 4c. As described above, the shapes of the plates 3b and 4b are different depending on the presence or absence of the standing piece 3d, but the shapes of the plates 3b and 4b are not different in other points.
0034]
  Accordingly, as shown in FIG. 1, when the two casing portions 3 and 4 are connected such that the plates 3b and 4b are back to back, the upright piece 3d on the inner peripheral edge of the opening 3c is opened. A space area A that fits inside the inner periphery of 4c and that is above the interior of the casing parts 3 and 4_Three , A_Four Are communicated directly via the ring-shaped passage of the upright piece 3d on the inner peripheral edge of the opening 3c.
0035]
  Moreover, each wall surface part of plate 3b, 4b below opening 3c, 4c is faced through the heat insulation gap | interval B which consists of a slight clearance gap. Reference numerals 20 and 20 denote protrusions respectively formed at two lower portions of the plates 3b and 4b in order to keep the heat insulation gap B at a predetermined interval (see FIGS. 10 and 15).
0036]
  Thus, the evaporator 5 is accommodated in one casing part 3 of the casings 2 assembled from the two casing parts 3, 4, and the absorber 6 is accommodated in the other casing part 4. ing. Although not shown in detail, the evaporator 5 and the absorber 6 are constituted by a multi-plate heat exchanger.
0037]
  The supercooler 7 crosses over the openings 3c and 4c of the plate 3b corresponding to the upper communication port of the two casing parts 3 and 4 so as to straddle the upper part of the evaporator 5 and the upper part of the absorber 6. It is arranged in a table. As shown in FIGS. 1 and 2, the supercooler 7 is configured by a flat radiator type fin-and-tube heat exchanger.
0038]
  In addition, the supercooler 7 is supported at the lower edge of the opening 3c of the plate 3b in the portion slightly to the right in FIG. 1, and the header portion on the left side of the subcooler 7 through the inlet pipe 7a for the condensed refrigerant. It is supported by the bottom wall of the tank 4a, and its right header portion is supported by the bottom wall of the tank 3a through the outlet pipe 7b for condensed refrigerant. The condensed refrigerant inlet pipe 7a and outlet pipe 7b penetrate the bottom walls of the tanks 4a and 3a in an airtight manner.
0039]
  In one casing portion 3, a condensing refrigerant spray tube 9 exiting the supercooler 7 and decompressed by the expansion valve 8 exits in a space between the right portion of the supercooler 7 and the evaporator 5. However, it is attached airtightly through the bottom wall of the tank 3a. As shown in FIG. 3, the spray tube 9 forms a T-shaped tube, and the condensed refrigerant is sprayed uniformly onto the evaporator 5 from a tube portion branched vertically in FIG.
0040]
  Further, in the other casing portion 4, in the space between the left portion of the supercooler 7 and the absorber 6, there is a concentrated absorption liquid spray tube 10 that is concentrated after leaving a regenerator (not shown). The bottom wall of the tank 4a is attached airtightly. The spray tube 10 also forms a T-shaped tube as shown in FIG. 3, and the concentrated absorbent is sprayed uniformly onto the absorber 6 from the tube portion branched vertically in FIG. .
0041]
  In the evaporator 5, the brine flows from the lower inlet pipe 11 and flows out from the upper outlet pipe 12. During this time, the heat of evaporation is taken away by the condensed refrigerant sprayed from the spray tube 9 and cooled.
0042]
  Cooling water flows into the absorber 6 from the lower inlet pipe 13 and out of the upper outlet pipe 14. During this time, the concentrated absorbent sprayed from the spray tube 10 absorbs the evaporated refrigerant (refrigerant vapor) generated in the evaporator 5 and becomes a rare absorbent and accumulates at the bottom of the casing portion 4. The dilute absorbent accumulated in the bottom is sent to the next stage regenerator via the outlet pipe 15.
0043]
  The evaporative refrigerant (temperature 10 ° C.) generated in the evaporator 5 is first transferred to the absorber 6 in the next stage and first absorbed in the concentrated absorbent, first in the space area A above the casing portion 3._Three Inside, it flows in the direction orthogonal to the condensed refrigerant | coolant which flows in the right side part of the subcooler 7, and performs heat exchange with this.
0044]
  Then, the space area A above the casing part 4_Four Inside, it flows in the direction orthogonal to the condensed refrigerant | coolant which flows in the left part of the subcooler 7, and performs heat exchange with this. In this way, heat exchange is performed between the evaporative refrigerant and the condensed refrigerant in the form of an orthogonal counter flow.
0045]
  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 when a conventional combined heat exchanger is used, and the cooling performance of the brine in the evaporator 5 is improved accordingly.
0046]
  On the other hand, the temperature of the evaporative refrigerant exiting the right part of the supercooler 7 rises to 20 ° C., and then the temperature of the evaporative refrigerant exiting the left part toward the absorber 6 rises to 40 ° C. However, this temperature is also several degrees lower than when a conventional combination-integrated heat exchanger is used, so that the burden of cooling water on the absorber 6 is reduced and the absorption efficiency is improved. ing.
0047]
  In FIG. 3, 16 is a concentrated absorbent spray tube, which is attached at the same height as the spray tube 10, and the spray of the concentrated absorbent by the spray tube 10 does not reach the end of the absorber 6 sufficiently. In some cases, it is used as appropriate.
0048]
  17 is a boss portion for attaching and fixing a drain discharge pipe accumulated at the bottom of the casing portion 3, 18 is a boss portion for attaching and fixing the stays for supporting the evaporator 5 and the absorber 6, and 19 is It is a boss part for instrument attachment.
0049]
  Next, the manufacturing method of the combination integrated heat exchanger 1 of the evaporator 5, the absorber 6, and the subcooler 7 in this embodiment is demonstrated.
  First, tanks 3a and 4a constituting the two casing parts 3 and 4 and plates 3b and 4b for covering the openings of the tanks 3a and 4a are prepared, and one side of the plates 3b and 4b is prepared. Forms openings (communication ports) 3c, 4c (process)(1)).
0050]
  Next, a first assembly U as described below is formed by using brazing means with the tanks 3a, 4a and the plates 3b, 4b as base materials.₁ Or fifth assembly U_Five Manufacturing process(2)).
0051]
  That is, as shown in FIG. 16, the core portion 5a of the evaporator 5 is integrally fixed to the plate 3b by brazing and attached to a predetermined portion thereof.₁ Manufacturing. A brine inlet pipe 11 and outlet pipe 12 are also fixedly attached to the core portion 5a by brazing.
0052]
  Further, as shown in FIG. 16, the core portion 6a of the absorber 6 is fixedly attached to the plate 4b at a predetermined position by brazing and attached to the second assembly U.₂ Manufacturing. An inlet pipe 13 and an outlet pipe 14 for the cooling water are also fixedly attached to the core portion 6a by brazing.
0053]
  Further, as shown in FIG. 17, required pipes such as a condensed refrigerant spray pipe 9 and a drain discharge pipe mounting boss portion 17 are fixedly attached to the tank 3a by brazing. 3 assembly U_Three Manufacturing.
0054]
  Further, as shown in FIG. 17, necessary pipes such as the concentrated absorbent spraying pipe 10, the diluted absorbent outlet pipe 15, and the instrument mounting boss 19 are fixed to the tank 4a by brazing. And attach the fourth assembly U_Four Manufacturing.
0055]
  In addition, the above first assembly U₁ Or fourth assembly U_Four A supercooler comprising a flat radiator type fin-and-tube heat exchanger is manufactured using the brazing means in parallel with the manufacture of the fifth assembly U._Five Prepare.
0056]
  The above first assembly U₁ Or fifth assembly U_Five The brazing material used in the manufacture of_e Or C for SUS_u Brazing or N_i Brazing and component A_l In this case, ordinary clad brazing is adopted.
0057]
  As described above, the first assembly U₁ Or fifth assembly U_Five Is manufactured and prepared, then, as illustrated in FIG.₁ And second assembly U₂ The plates 3b and 4b face each other, and both these assemblies U₁ , U₂ Are fixed together by brazing and assembled into an integral assembly (U₁ + U₂ Manufacturing process(3)). In this step, the protrusions 20 and 20 are also brazed.
0058]
  Then, the fifth assembly U_Five , Integrated assembly (U₁ + U₂ ) Are arranged across the openings 3c, 4c formed in the respective plates 3b, 4b, and the remaining third assembly U is arranged._Three And the fourth assembly U_Four And temporarily assembling the combination-integrated heat exchanger 1 as shown in FIG.(4)).
0059]
  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 are formed in the tank 3a. The holes 21, 22, and 24 (see FIG. 7) are inserted into the holes 25, 26, and 28 (see FIG. 12) formed in the tank 4a, respectively.
0060]
  7, the hole 23 is a hole for mounting the condensed refrigerant spray tube 9, the hole 27 is a hole for mounting the concentrated absorbent spray tube 10, and the hole 29 is a boss for mounting the instrument. This is a mounting hole.
0061]
  In this way, when the combination-integrated heat exchanger 1 is temporarily assembled, then the first assembly U₁ And third assembly U_Three Contact part T₁ ~ T_Four , Second assembly U₂ And fourth assembly U_Four Contact part T_Five ~ T₈ , Third assembly U_Three And fifth assembly U_Five Contact part T₉ , Fourth assembly U_Four And fifth assembly U_Five Contact part T_TenTig weld each (process)(5)). Contact part T₁ ~ T_TenIs shown in FIG._Three An enlarged view of is shown in FIG.
  As described above, the combination-integrated heat exchanger 1 of the evaporator 5, the absorber 6, and the supercooler 7 is completed.
0062]
  Since the combination-integrated heat exchanger 1 of the evaporator 5, the absorber 6 and the supercooler 7 and the manufacturing method thereof in the present embodiment are configured as described above, the following effects can be achieved. .
0063]
  The casing 2 of the combined heat exchanger 1 includes two casing parts 3 and 4, and these two casing parts 3 and 4 are openings (upper communication ports) formed in the upper part of the plates 3 b and 4 b. 3c, 4c communicated with each other, separated by a heat insulating gap B below the openings 3c, 4c, and the subcooler 7 supported by the standing piece 3d on the inner peripheral edge of the opening 3c, the opening 3c Across the top of the evaporator 5 and the top of the absorber 6.
0064]
  As a result, a sufficient heat transfer area of the subcooler 7 can be obtained, and the condensed refrigerant flowing in the supercooler 7 and the evaporated refrigerant generated in the evaporator 5 are in the form of orthogonal counter flow heat. Exchange is possible, and heat transfer does not occur between the evaporator 5 and the absorber 6 by the heat insulation gap B below the openings 3c and 4c, so that the heat exchange performance in each heat exchanger portion is improved. And the cooling performance of the brine in the evaporator 5 improves, absorption of the evaporative refrigerant in the absorber 6 is accelerated | stimulated, and the coefficient of performance of an absorption refrigerator improves.
0065]
  In addition, the space area A above the evaporator 5 and the absorber 6_Three , A_Four The space efficiency is improved, the space efficiency is improved, the structure of the combined heat exchanger 1 including the evaporator 5, the absorber 6 and the supercooler 7 is further reduced, and further the absorption refrigerator is further improved. The structure can be miniaturized.
0066]
  Further, the supercooler 7 is disposed horizontally so as to cross over the communication ports (openings 3c, 4c) of the two casing parts 3, 4 so as to straddle the upper part of the evaporator 5 and the upper part of the absorber 6. Plays a function as an eliminator, separates droplets contained in the evaporating refrigerant generated in the evaporator 5, and prevents the evaporating refrigerant from leaving the evaporator 5 with the droplets, The absorbing liquid sprayed in the absorber 6 is well prevented from being mixed into the evaporator 5 due to the rebound.
0067]
  Furthermore, the manufacturing method of the combined-integrated heat exchanger 1 including the evaporator 5, the absorber 6 and the supercooler 7 having the various effects as described above is the process described above.(1)Or(5)It is comprised by.
0068]
  As a result, the first assembly U manufactured using the brazing means is used.₁ Or fifth assembly U_Five Prepare the first assembly U₁ And second assembly U₂ Are fixed together by brazing and assembled, and then the remaining third assembly U is attached to this integral assembly._Three Or fifth assembly U_Five Assembling, the combined heat exchanger 1 is temporarily assembled, and the abutting portion (excluding the brazed portion) T₁ ~ T_TenTIG welding can produce the combined-integrated heat exchanger 1 of the evaporator 5, the absorber 6 and the supercooler 7 at a time, thereby improving productivity and reducing manufacturing costs. Can do.
0069]
  The main parts constituting the combined heat exchanger 1 including the evaporator 5, the absorber 6 and the supercooler 7 are divided into five assemblies U.₁ ~ U_Five These five assemblies U₁ ~ U_Five After manufacturing these five assemblies U₁ ~ U_Five As a result, the final product is finished, so that the rate of occurrence of defective products is extremely small and robust, and a high-quality combination-integrated heat exchanger 1 can be obtained.
0070]
  Further, the evaporator 5 and the absorber 6 are constituted by a multi-plate heat exchanger, and the supercooler 7 is constituted by a fin-and-tube heat exchanger, so brazing means are used. Thus, these individual heat exchangers can be easily manufactured.
0071]
  Further, an upright piece 3d is bent at the inner peripheral edge of the opening 3c in the upper part of the plate 3b, and this is just fitted to the inner peripheral edge of the opening 4c in the upper part of the plate 4b. These plates 3b and 4b can be easily positioned and the subcooler 7 can be supported without damage.
[Brief description of the drawings]
FIG. 1 claim 1 and claim of the present application6It is the front view which cut and looked at the front cover part of the integrated heat exchanger of the combination of an evaporator, an absorber, and a supercooler in one embodiment of the invention described in 1).
FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
FIG. 3 is a cross-sectional view taken along line III-III in FIG.
4 is a cross-sectional view taken along line IV-IV in FIG. 1. FIG.
FIG. 5 is a partially enlarged view of FIG. 1;
6 is a vertical cross-sectional view of a tank that is a component of one casing portion constituting the casing of the combined heat exchanger of FIG.
7 is a right side view of FIG. 6. FIG.
8 is a cross-sectional view taken along line VIII-VIII in FIG.
FIG. 9 is a longitudinal sectional view of a plate which is a constituent element of the one casing part.
10 is a right side view of FIG. 9. FIG.
FIG. 11 is a longitudinal sectional view of a tank that is a component of the other casing part that constitutes the casing of the combined heat exchanger of FIG. 1;
12 is a left side view of FIG.
13 is a cross-sectional view taken along line XIII-XIII in FIG.
FIG. 14 is a longitudinal sectional view of a plate which is a component of the other casing part.
15 is a left side view of FIG.
FIG. 16 is a diagram showing a manufacturing process of the combined heat exchanger of FIG. 1;
FIG. 17 is a diagram showing another manufacturing process.
FIG. 18 is a partially enlarged view of FIG. 1 and shows a joined state by TIG welding.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Combination integrated 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 ... Supercooler, 7a ... Condensed refrigerant inlet pipe, 7b ... Condensed refrigerant outlet pipe, 8 ... Expansion valve, 9 ... Condensed refrigerant spray pipe, 10 ... Condensed refrigerant spray 11 ... Brine inlet pipe, 12 ... Brine outlet pipe, 13 ... Cooling water inlet pipe, 14 ... Cooling water outlet pipe, 15 ... Dilute absorbent outlet pipe, 16 ... Dense absorbent spray pipe, 17 ... Drain discharge pipe Mounting boss, 18 ... Stay mounting boss, 19 ... Instrument mounting boss, 20 ... Protrusion, 21-29 ... Mounting hole, A_Three , A_Four ... Spatial region, B ... Adiabatic gap, T₁ ~ T_Ten... Contact part (TIG welded part), U₁ ~ U_Five ... first to fifth assemblies.

Claims (6)

The casing of the combined heat exchanger consists of two casing parts,
The two casing parts are communicated via an upper communication port, and are separated by a heat-insulating gap below the communication port;
An evaporator is accommodated in one casing part of the two casing parts,
An absorber is accommodated in the other casing part of the two casing parts,
Combined integrated heat of an evaporator, an absorber and a supercooler, wherein a supercooler is disposed horizontally so as to cross the communication port and straddle the upper part of the evaporator and the upper part of the absorber In the manufacturing method of an exchanger, it consists of the following process (1)-(5) , The manufacturing method of the combined integral type heat exchanger of an evaporator, an absorber, and a subcooler characterized by the above-mentioned.
(1) Prepare two types of tanks that constitute each of the two casing parts and a plate that covers the opening of the tank, and the communication port is formed in one side of each plate. .
(2) a first assembly in which the plate which is a component of the one casing portion and the core portion of the evaporator are integrated by brazing;
A second assembly in which the plate which is a component of the other casing part and the core part of the absorber are integrated by brazing;
A third assembly in which required pipes such as a condensed refrigerant spray pipe are integrally fixed to the tank, which is a component of the one casing part, by brazing;
A fourth assembly in which required pipes such as a concentrated absorbent spray pipe and a rare absorbent outlet pipe are integrally fixed to the tank, which is a component of the other casing part, by brazing;
A fifth assembly is prepared in which the supercooler is constituted by a flat heat exchanger assembled integrally by brazing.
(3) The plates of the first assembly and the second assembly are brought to face each other, and these assemblies are assembled and fixed together by brazing.
(4) The fifth assembly is disposed so as to cross the communication openings formed in the plates of the integrated assembly in the step (3) , and the remaining third assembly and the fourth assembly are arranged. The assembly is assembled, and the combined heat exchanger is temporarily assembled.
(5) Tig weld the abutting portions between the assemblies in the temporary assembly in the step (4) except for the brazed portion.   The evaporator according to claim 1, wherein the evaporator and the absorber are configured by a multi-plate heat exchanger, and the supercooler is configured by a fin-and-tube heat exchanger. , Manufacturing method of combined heat exchanger combined with absorber and subcooler. In an integrated heat exchanger combining an evaporator, an absorber and a subcooler,
  The heat exchanger casing consists of two casing parts,
  The two casing parts are communicated via an upper communication port, and separated by a heat insulating gap below the communication port;
  An evaporator is accommodated in one casing part of the two casing parts,
  An absorber is accommodated in the other casing part of the two casing parts,
  An evaporator, an absorber, and a supercooler, wherein a supercooler is disposed horizontally across the communication port and across the upper part of the evaporator and the upper part of the absorber. Combined heat exchanger. 4. The combined heat exchanger according to claim 3, wherein the supercooler is supported by a lower edge of the communication port. The supercooler is disposed so that the condensed refrigerant flowing in the supercooler and the evaporated refrigerant generated in the evaporator exchange heat in an orthogonal counterflow type. 5. A combined-integrated heat exchanger comprising an evaporator, an absorber, and a subcooler according to claim 3 or 4. The combination of the evaporator, the absorber, and the subcooler according to any one of claims 3 to 5, wherein the evaporator and the absorber are configured by a multi-plate heat exchanger. Heat exchanger.

Images