US3864937A - Rectifier construction for absorption type refrigerator - Google Patents

Rectifier construction for absorption type refrigerator Download PDF

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Publication number
US3864937A
US3864937A US441808A US44180874A US3864937A US 3864937 A US3864937 A US 3864937A US 441808 A US441808 A US 441808A US 44180874 A US44180874 A US 44180874A US 3864937 A US3864937 A US 3864937A
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United States
Prior art keywords
rectifier
pipes
boiler
pipe
series
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Expired - Lifetime
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US441808A
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English (en)
Inventor
Amram Asher
Nicolas Eber
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Sarlab AG
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Sarlab AG
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B33/00—Boilers; Analysers; Rectifiers

Definitions

  • ABSTRACT An absorption refrigerator in which a rectifier is located above the boiler and has two concentric pipes. The absorptionsolution that is moved upwardly from the boiler flows subsequently downwardly while the refrigerant and absorption medium vapors flow upwardly in the space between the two pipes.
  • One of the pipes is so constructed as to form a series of narrow constrictions to the flow path above the zone in which heat is applied to the boilers so that both liquid and vapor are in counterflow but without interfering with each other.
  • Refrigerating apparatus are known provided with rectifiers that have narrow constrictions of uniform or almost uniform width.
  • the constrictions formed in the structure function as a rectifier that ensures a fairly efficient counterflow heat exchange between the relatively cold solution that is rich in refrigerant and which flows in a downward direction and the relatively hot solution that is poor in refrigerant and flows in an upward direction.
  • the rectifier construction additionally prevents the intermixing of rich and weak liquid which are located in different parts of the boiler by means of rising vapors.
  • the smooth operation of the rectifier is necessary for an efficient boiler; this, in turn, creates an efficient refrigeration apparatus.
  • rectifiers having a series of narrow constrictions are simple and inexpensive to manufacture and their construction does not involve an increase of the wetted and hot surface of the boiler and therefore there is no increased consumption of corrosion inhibitor.
  • rectifiers having a series of narrow constrictions have certain drawbacks and disadvantages which has reduced the efficiency of the refrigeration apparatus.
  • the constrictions in the rectifiers are extremely narrow, with a radial width not exceeding 1 mm. in order to carry out a satisfactory rectification. If the constrictions are made larger, then the proper rectification cannot be achieved, since the liquid and vapor flow in different locations in the constriction and there is no satisfactory counterflow exchange of heat and mass.
  • a rectifier is provided with a series ofsmall constrictions of almost uniform width a given quantity of liquid is accumulated in a liquid column above each constriction and a vapor cushion is formed below the constriction.
  • the size of both the liquid column and the vapor cushion is maintained more or less constant.
  • the vapor passes through the constrictions and the liquid columns above them in the shape of small bubbles and the liquid flows downwardly on the pipe wall in the form generally of a thin film. In this state of equilibrium, the pressure drop above the constrictions is balanced by the liquid columns located above the constrictions.
  • a result of the known rectifier structure having narrow constrictions of uniform or substantially uniform radial dimensions is to limit the boiler of a refrigeration apparatus to comparatively small capacity.
  • a further disadvantage of such rectifiers is that precise accuracy in manufacturing these structures is necessary.
  • An object of the present invention is to provide in each constriction of the present rectifier at least one corner or angle-shaped portion connecting a portion of greater width to one or more than one narrow portions.
  • the liquid flows by capillary action downwardly without preventing the vapor from flowing upwardly in counterflow to the liquid.
  • Each of the narrow portions is so dimensioned as to have a width not exceeding 1 mm.
  • FIG. 2 is a side elevational view of the rectifier shown on an enlarged scale
  • FIG. 3 is a cross-sectional view of the rectifier taken along the lines Ill-Ill of FIG. 2;
  • FIG. 4 is a cross-sectional view of the rectifier taken along the lines IVIV of FIG. 2;
  • FIG. 5 is an elevational view of the rectifier taken in the direction labeled V of FIG. 2;
  • FIG. 6 is an elevational view of a modified embodiment of the rectifier.
  • FIG. 7 is a cross-section view thereof.
  • the boiler comprises two pipes 10 and 11 arranged concentrically.
  • the pipes are connected to an absorber of the refrigeration apparatus by means of a heat exchanger 12.
  • the inner pipe 10 is connected to the absorber vessel and conveys absorption solution to the boiler B, for example a solution rich in refrigerant, such as ammonia in water.
  • a pump conduit 13 Located inside the boiler and within the inner pipe 10 is a pump conduit 13.
  • the inner pipe 10 is shown closed at its upper end 14 where it is welded to the conduit pipe 13 at a location above the rectifier 15. The latter is situated directly above the heated part of the boiler.
  • heat is supplied to the boiler by an electric heating cartridge 16 that is connected to an energy source by means of electrical conduits 17, which may be an AC power supply or a battery.
  • electrical conduits 17 which may be an AC power supply or a battery.
  • the heating cartridge 16 is disposed within a metal sleeve 18 that is welded to the outer pipe 11.
  • a flue pipe 19 is illustrated as also being welded to the pipe 11.
  • the boiler can be heated alternatively by the electric heating cartridge 16 or by a gas or kerosene burner (not shown) but which may be located below the flue pipe 19.
  • a heat exchange is performed in an effective manner by means of rectifiers of the type shown in FIGS. 2-5.
  • each rectifier 15 there are indentations 21 made in the outer pipe 11.
  • the indentations 21 spatially engage the outer surface of inner pipe to thereby maintain the inner pipe concentric with outer pipe 11.
  • the rectifier has constrictions 22 in the flow path of the partly enriched solution.
  • the outer pipe 11, as seen in FIG. 4, is compressed in a manner so that the crosssection of the pipe is reduced at predetermined locations within the rectifier 15 of the boiler B and corner or angle-shaped portions 23 are formed at opposite ends.
  • the outer pipe 11 is provided with wide portions 24 connected by narrow portions 25.
  • the wide portions 24 are mainly for the passage of vapor and the narrow portions 25 are principally for the passage of liquid. Both the liquid and vapor are in counterflow in the corner-shaped portions 23. Furthermore, when the present rectifier operates, both counterflow between the working media and the intense contact between liquid and vapor are ensured. Moreover, the boiler operates in a stable manner and properly with a varying heat supply and within a large range of capacity.
  • FIG. 3 shows the indentations 21 of the outer pipe 11 of the rectifier maintaining the inner pipe 10 in a concentric position.
  • FIG. 4 discloses the constriction 22 having narrow portions 25, wide portions 24, and diametrically opposed corner or angle-shaped portions 23.
  • the rectifier section 15, as seen in FIG. 2, illustrates corner-shaped sections 23 disposed one above the other. Nevertheless, it is possible to change the pattern, as seen in FIG. 6, wherein each constriction 22 is turned 90 relative to the adjacent constriction.
  • FIG. 7 is a cross-sectional view of the alternate embodiment shown in FIG. 6 and shows the relationship of the constrictions 22 to each other. The operating characteristics of this constriction is also favorable.
  • An absorption refrigerating apparatus provided with a boiler having a rectifier, said rectifier comprising two pipes in which one pipe is located concentrically within the other pipe to form a space therebetween functioning as a flow path, the raised absorption solution in said apparatus flows downwardly in said space while the refrigerant and the absorption medium vapors flow upwardly therein, said flow path having a series of constrictions formed in a part of one of said pipes above a zone in which heat is supplied to said boiler wherein each constriction has at least one angled, corner-shaped part forming a wide portion and at least one narrow portion that are interconnected.
  • each angled corner-shaped part is so constructed and formed whereby liquid flows downwardly by capillary action without preventing the vapor from flowing upwardly in counterflow to the liquid.
  • each constriction has two diametrically opposed angled cornershaped parts and two narrow portions respectively connecting said wide portions.
  • a rectifier as claimed in claim 5 wherein a series of said angled corner-shaped parts are disposed one above the other.
  • a rectifier as claimed in claim 5 wherein in a series of angled corner-shaped parts each part is positioned approximately relative to an adjacent angled corner-shaped part.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Sorption Type Refrigeration Machines (AREA)
  • Cookers (AREA)
US441808A 1973-02-13 1974-02-12 Rectifier construction for absorption type refrigerator Expired - Lifetime US3864937A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7301973A SE374192B (it) 1973-02-13 1973-02-13

Publications (1)

Publication Number Publication Date
US3864937A true US3864937A (en) 1975-02-11

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ID=20316619

Family Applications (1)

Application Number Title Priority Date Filing Date
US441808A Expired - Lifetime US3864937A (en) 1973-02-13 1974-02-12 Rectifier construction for absorption type refrigerator

Country Status (6)

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US (1) US3864937A (it)
JP (1) JPS5644336B2 (it)
CH (1) CH560876A5 (it)
DE (1) DE7404294U (it)
GB (1) GB1434146A (it)
SE (1) SE374192B (it)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4185470A (en) * 1976-09-02 1980-01-29 Nicolas Eber Rectifier for absorption cooling unit
US4362029A (en) * 1980-04-15 1982-12-07 Aktiebolaget Electrolux Absorption refrigerator boiler construction
US20060096744A1 (en) * 2004-11-09 2006-05-11 Denso Corporation Double-wall pipe, method of manufacturing the same and refrigerant cycle device provided with the same
US20120043055A1 (en) * 2010-08-18 2012-02-23 Halla Climate Control Corp. Double Pipe Type Heat Exchanger and Method for Manufacturing the Same
US20170030652A1 (en) * 2015-07-30 2017-02-02 Senior Uk Limited Finned coaxial cooler

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS545159U (it) * 1977-06-14 1979-01-13

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3805546A (en) * 1972-07-27 1974-04-23 Electrolux Ab Absorption refrigeration apparatus having generator structure for stratifying and reducing agitation of absorption solution in a downwardly flowing liquid column in which expelled vapor bubbles upwardly therethrough

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3805546A (en) * 1972-07-27 1974-04-23 Electrolux Ab Absorption refrigeration apparatus having generator structure for stratifying and reducing agitation of absorption solution in a downwardly flowing liquid column in which expelled vapor bubbles upwardly therethrough

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4185470A (en) * 1976-09-02 1980-01-29 Nicolas Eber Rectifier for absorption cooling unit
US4362029A (en) * 1980-04-15 1982-12-07 Aktiebolaget Electrolux Absorption refrigerator boiler construction
US20110073208A1 (en) * 2004-11-09 2011-03-31 Denso Corporation Double-wall pipe, method of manufacturing the same and refrigerant cycle device provided with the same
US20060096314A1 (en) * 2004-11-09 2006-05-11 Denso Corporation Double-wall pipe and refrigerant cycle device using the same
US20060112556A1 (en) * 2004-11-09 2006-06-01 Denso Corporation Method and apparatus of manufacturing grooved pipe, and structure thereof
US7866378B2 (en) 2004-11-09 2011-01-11 Denso Corporation Double-wall pipe, method of manufacturing the same and refrigerant cycle device provided with the same
US20060096744A1 (en) * 2004-11-09 2006-05-11 Denso Corporation Double-wall pipe, method of manufacturing the same and refrigerant cycle device provided with the same
US9669499B2 (en) 2004-11-09 2017-06-06 Denso Corporation Double-wall pipe, method of manufacturing the same and refrigerant cycle device provided with the same
US20120043055A1 (en) * 2010-08-18 2012-02-23 Halla Climate Control Corp. Double Pipe Type Heat Exchanger and Method for Manufacturing the Same
US9091487B2 (en) * 2010-08-18 2015-07-28 Halla Visteon Climate Control Corporation Double pipe type heat exchanger and method for manufacturing the same
US9821364B2 (en) 2010-08-18 2017-11-21 Hanon Systems Double pipe type heat exchanger and method for manufacturing the same
US20170030652A1 (en) * 2015-07-30 2017-02-02 Senior Uk Limited Finned coaxial cooler
US11029095B2 (en) * 2015-07-30 2021-06-08 Senior Uk Limited Finned coaxial cooler

Also Published As

Publication number Publication date
DE2405950A1 (de) 1974-08-29
GB1434146A (en) 1976-05-05
JPS49112251A (it) 1974-10-25
CH560876A5 (it) 1975-04-15
SE374192B (it) 1975-02-24
DE2405950B2 (de) 1975-10-09
DE7404294U (de) 1976-12-02
JPS5644336B2 (it) 1981-10-19

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