US2912230A - Refrigerating apparatus - Google Patents
Refrigerating apparatus Download PDFInfo
- Publication number
- US2912230A US2912230A US429562A US42956254A US2912230A US 2912230 A US2912230 A US 2912230A US 429562 A US429562 A US 429562A US 42956254 A US42956254 A US 42956254A US 2912230 A US2912230 A US 2912230A
- Authority
- US
- United States
- Prior art keywords
- plate
- tube
- flange
- tubing
- wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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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
- F25B39/00—Evaporators; Condensers
- F25B39/02—Evaporators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
- B21D53/08—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal
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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
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/02—Details of evaporators
- F25B2339/023—Evaporators consisting of one or several sheets on one face of which is fixed a refrigerant carrying coil
Definitions
- Figure 1 is an elevational view of a plate type evaporator constructed in accordance with my invention.
- Figure 2 is a fragmentary sectional view taken substantially on line 22. of Figure 1.
- reference numeral generally designates a plate type evaporator or use in a modern refrigerator wherein the evaporator is automatically defrosted during each off cycle.
- This evaporator includes a substantially flat plate 12 which is preferably made of aluminum and has brazed thereto refrigerant tubing 14 into which refrigerant is supplied for refrigerating the plate. Plates of this type are adapted to be used in refrigerators of the type disclosed in Jacobs et al. Patent No. 2,672,023 to which reference is hereby made for a more complete disclosure of the system in which the evaporator is to be used.
- the tubing 14 is preferably extruded aluminum which includes an integral projection 16 which is formed as a part of the main tubing when the tubing itself is extruded.
- the extruded tubing 14 is bent into the desired shape such as the serpentine shape shown in Figure 1 of the drawing with the integral projection 16 always facing in the same general direction.
- the tubing 14 is then placed adjacent to the plate 12 with the projection 16 ar- This rupture causes ranged in contact with the plate 12.
- the projection .16 is then brazed to the plate 12 by the use of suitable aluminum brazing material which forms a fillet 18 between the plate and the outer end of the projection 16 as shown in Figure 2.
- the outer end or edge of the projection 16 is preferably rounded as shown so that if in bending the tubing in serpentine shape the projection 16 does not always extend perpendicularly toward the plate 12,'the,re
- the thickness of the flange is preferably slightly greater than the thickness of the wall of the tubing so as to provide a good heat transfer path between the tube and the plate.
- any frost blister which may form as the result of any porosity in the fillet 18 will not be close enough to the wall of the refrigerant tube 14 to be capable of puncturing the wall of the refrigerant passage.
- Applicants construction does not attempt to eliminate the presence of surface cracks and voids in the fillet of brazing material as this has proven to be impossible from a practical standpoint.
- Applicants flange 16 removes the tubing surface far enough from the fillet of brazing material so that any frost blister which might form in the brazing material can break without causing any refrigerant leak.
- a support element a tube having said support, said flange extending a distance greater than the thickness of the wall of said tube throughout the width of said flange, and metallic means bonding said flange to said support, said flange serving to hold said support and said tube wall in spaced relationship from one another, at least a portion of said flange being interposed between the wall of said tube and said metallic bonding means by said flange over the entire area of said bonding means.
- a support element a tube having a projecting flange provided with a rolled edge arranged adjacent said support, and means metallically bonding References Cited in the file of this patent said flange to said support, said flange serving to hold said UNITED STATES PATENTS support and said tube in spaced relationship to one an- 7 other, said projecting flange serving to increase the thick- 211711790 Hlgham P 1939 ness of the tube wall throughout the entire width of said 5 2,359,926 McCullough 101 1944 flange, at least a portion of said flange being interposed 213861889 Furry 1945 between the wall of said tube and said bonding means at 14441824 Han July 1948 the point where the wall is closest to said bonding means 2469'963 Groslean et a1 May 101 1949 2,718,383 Frenger Sept. 20, 1955 whereby the portion of the tube Wall closest to said bonding means is protected from rupture by the interposition 10 of said flange between said
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Description
Nov. 10, 1959 F. l. RATAICZAK REFRIGERATING APPARATUS Filed y 13. 1954 INVENTpR. Francis I. Rafalczak REFRIGERATIN G APPARATUS Francis I. Rataiczak, Dayton, Ohio, assignor to General Motors Corporation, Detroit, Mich., a corporation of Delaware Application May 13, 1954, Serial No. 429,562 a 3 Claims. (Cl. 257-256) This invention relates to refrigerating apparatus and more particularly to a plate type evaporator and the method of manufacturing the same.
Considerable difliculty has been experienced in the manufacture of plate type evaporators for us in refrigerators of the type in which the evaporators are defrosted during each oif cycle. This difficulty results from the fact that it is diflicult to braze a tube to a plate Without producing objectionable cracks or voids in the metallic fillet between the tube and the plate. Moisture condenses in those voids which extend to the surface of the metal and the alternate freezing and thawing of this moisture causes these voids to become larger and larger until the metal surrounding the void ruptures. a refrigerant leak if the metal which ruptures happens to be the wall of the tubing forming the refrigerant line. It is an object of this invention to prevent such leaks from forming without attempting to eliminate such voids. More particularly it is an object of this invention to use an extruded tube which has a solid projection on its one side which may be brazed to a plate in such a manner that any cracks or voids which may form in the fillet of brazing material will not be formed close enough to the main tube wall to cause rupture of the tube Wall.
Thus it is an object of this invention to attach a refrigerant line to a heat transfer plate by means of a flange which is free from pores or cracks adjacent the refrigerant passage.
Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawings, wherein a preferred form of the present invention is clearly shown.
In the drawings:
Figure 1 is an elevational view of a plate type evaporator constructed in accordance with my invention; and,
Figure 2 is a fragmentary sectional view taken substantially on line 22. of Figure 1.
I Referring now to the drawing wherein a preferred embodiment of the invention has been shown, reference numeral generally designates a plate type evaporator or use in a modern refrigerator wherein the evaporator is automatically defrosted during each off cycle. This evaporator includes a substantially flat plate 12 which is preferably made of aluminum and has brazed thereto refrigerant tubing 14 into which refrigerant is supplied for refrigerating the plate. Plates of this type are adapted to be used in refrigerators of the type disclosed in Jacobs et al. Patent No. 2,672,023 to which reference is hereby made for a more complete disclosure of the system in which the evaporator is to be used.
The tubing 14 is preferably extruded aluminum which includes an integral projection 16 which is formed as a part of the main tubing when the tubing itself is extruded. The extruded tubing 14 is bent into the desired shape such as the serpentine shape shown in Figure 1 of the drawing with the integral projection 16 always facing in the same general direction. The tubing 14 is then placed adjacent to the plate 12 with the projection 16 ar- This rupture causes ranged in contact with the plate 12. The projection .16 is then brazed to the plate 12 by the use of suitable aluminum brazing material which forms a fillet 18 between the plate and the outer end of the projection 16 as shown in Figure 2. The outer end or edge of the projection 16 is preferably rounded as shown so that if in bending the tubing in serpentine shape the projection 16 does not always extend perpendicularly toward the plate 12,'the,re
will always be good contact between the plate 12 and the I rounded end portion of the projection 16. The thickness of the flange is preferably slightly greater than the thickness of the wall of the tubing so as to provide a good heat transfer path between the tube and the plate.
By virtue of the above described method and construction, it is obvious that any frost blister which may form as the result of any porosity in the fillet 18 will not be close enough to the wall of the refrigerant tube 14 to be capable of puncturing the wall of the refrigerant passage.
When a conventional piece of tubing is brazed to a flat plate by conventional brazing methods; the fillet of brazing material between the tube and the plate frequently contains minute cracks which are open at the surface and some of which extend into the interior of the brazing material. Moisture seeping into such a surface crack fills the crackand due to the frequent alternate thawing and freezing of the moisture, the crack gradually increases in size until it causes a break in the tube wall. Breaks of this type are eliminated by virtue of the construction shown in Figures 1 and 2 of this application.
Applicants construction does not attempt to eliminate the presence of surface cracks and voids in the fillet of brazing material as this has proven to be impossible from a practical standpoint. Applicants flange 16 removes the tubing surface far enough from the fillet of brazing material so that any frost blister which might form in the brazing material can break without causing any refrigerant leak.
While the form of embodiment of the invention as herein disclosed constitutes a preferred form, it is to be understood that other forms might be adopted, as may come within the scope of the claims which follow.
What is claimed is as follows:
1 In an evaporator, a support element, a tube having said support, said flange extending a distance greater than the thickness of the wall of said tube throughout the width of said flange, and metallic means bonding said flange to said support, said flange serving to hold said support and said tube wall in spaced relationship from one another, at least a portion of said flange being interposed between the wall of said tube and said metallic bonding means by said flange over the entire area of said bonding means. 3. In an evaporator, a support element, a tube having a projecting flange provided with a rolled edge arranged adjacent said support, and means metallically bonding References Cited in the file of this patent said flange to said support, said flange serving to hold said UNITED STATES PATENTS support and said tube in spaced relationship to one an- 7 other, said projecting flange serving to increase the thick- 211711790 Hlgham P 1939 ness of the tube wall throughout the entire width of said 5 2,359,926 McCullough 101 1944 flange, at least a portion of said flange being interposed 213861889 Furry 1945 between the wall of said tube and said bonding means at 14441824 Han July 1948 the point where the wall is closest to said bonding means 2469'963 Groslean et a1 May 101 1949 2,718,383 Frenger Sept. 20, 1955 whereby the portion of the tube Wall closest to said bonding means is protected from rupture by the interposition 10 of said flange between said tube wall and said bonding means.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US429562A US2912230A (en) | 1954-05-13 | 1954-05-13 | Refrigerating apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US429562A US2912230A (en) | 1954-05-13 | 1954-05-13 | Refrigerating apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
US2912230A true US2912230A (en) | 1959-11-10 |
Family
ID=23703779
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US429562A Expired - Lifetime US2912230A (en) | 1954-05-13 | 1954-05-13 | Refrigerating apparatus |
Country Status (1)
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US (1) | US2912230A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3251198A (en) * | 1964-02-28 | 1966-05-17 | Cornelius Co | Refrigerated cabinet |
US3442094A (en) * | 1967-12-13 | 1969-05-06 | Westinghouse Electric Corp | Thermal mastic |
US4102152A (en) * | 1976-08-27 | 1978-07-25 | Covault Darrell W | Heat exchange device for air conditioners |
US4489470A (en) * | 1982-01-26 | 1984-12-25 | White Consolidated Industries, Inc. | Refrigeration apparatus and method of making same |
US4979373A (en) * | 1989-02-06 | 1990-12-25 | Robert Huppee | Apparatus for making and maintaining an ice surface |
US5013344A (en) * | 1988-12-01 | 1991-05-07 | Thermadyne, Inc. | Icemaker and water purifier with controlled condensing temperature |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2171790A (en) * | 1938-07-02 | 1939-09-05 | Universal Cooler Corp | Refrigerator evaporator |
US2359926A (en) * | 1939-08-22 | 1944-10-10 | Bohn Aluminium & Brass Corp | Method of forming refrigeration units |
US2386889A (en) * | 1940-08-02 | 1945-10-16 | Outboard Marine & Mfg Co | Coil assembly |
US2444824A (en) * | 1944-11-29 | 1948-07-06 | Philco Corp | Refrigerant evaporator |
US2469963A (en) * | 1946-06-19 | 1949-05-10 | Harry W Grosjean | Heating unit |
US2718383A (en) * | 1944-12-18 | 1955-09-20 | Frenger Gunnar | Heating and ventilation system |
-
1954
- 1954-05-13 US US429562A patent/US2912230A/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2171790A (en) * | 1938-07-02 | 1939-09-05 | Universal Cooler Corp | Refrigerator evaporator |
US2359926A (en) * | 1939-08-22 | 1944-10-10 | Bohn Aluminium & Brass Corp | Method of forming refrigeration units |
US2386889A (en) * | 1940-08-02 | 1945-10-16 | Outboard Marine & Mfg Co | Coil assembly |
US2444824A (en) * | 1944-11-29 | 1948-07-06 | Philco Corp | Refrigerant evaporator |
US2718383A (en) * | 1944-12-18 | 1955-09-20 | Frenger Gunnar | Heating and ventilation system |
US2469963A (en) * | 1946-06-19 | 1949-05-10 | Harry W Grosjean | Heating unit |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3251198A (en) * | 1964-02-28 | 1966-05-17 | Cornelius Co | Refrigerated cabinet |
US3442094A (en) * | 1967-12-13 | 1969-05-06 | Westinghouse Electric Corp | Thermal mastic |
US4102152A (en) * | 1976-08-27 | 1978-07-25 | Covault Darrell W | Heat exchange device for air conditioners |
US4489470A (en) * | 1982-01-26 | 1984-12-25 | White Consolidated Industries, Inc. | Refrigeration apparatus and method of making same |
US5013344A (en) * | 1988-12-01 | 1991-05-07 | Thermadyne, Inc. | Icemaker and water purifier with controlled condensing temperature |
US4979373A (en) * | 1989-02-06 | 1990-12-25 | Robert Huppee | Apparatus for making and maintaining an ice surface |
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