US2054404A - Refrigeration apparatus - Google Patents
Refrigeration apparatus Download PDFInfo
- Publication number
- US2054404A US2054404A US10877A US1087735A US2054404A US 2054404 A US2054404 A US 2054404A US 10877 A US10877 A US 10877A US 1087735 A US1087735 A US 1087735A US 2054404 A US2054404 A US 2054404A
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- US
- United States
- Prior art keywords
- coils
- row
- rows
- unit
- headers
- 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
Links
- 238000005057 refrigeration Methods 0.000 title description 3
- 238000001816 cooling Methods 0.000 description 8
- 239000003507 refrigerant Substances 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
Images
Classifications
-
- 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
Definitions
- This invention relates to refrigerant evaporation coils which are particularly adapted for use in air conditioning systems.
- Fig. l is a side elevation of a cooling unit for an air conditioning system with the input and output headers thereof shown in section.
- Figs. 2, 8, and 4 are diagrammatic sectionstaken on the lines 2-2, 33, and 44of Fig. 1.
- the cooling unit consists of an upper or feed header ill, a suction header II, and a plurality of interposed cooling coils which are disposed in three vertically disposed rows l2, l3, and ll of horizontal tubes l5 of the same diameter, and connected,as herelnafter described, by loop fittings IS.
- the tubes "extend through a common set of cross fins l1 and they. are secured thereto.
- the unit is connected in the usual refrigerant circuit (not shown) wherein liquid is supplied to the header I0 through a feed conduit l8 under control of a thermostatic expansion valve l9, and, after being permitted to expand in the coils, it is removed from the suction header I I through a suction conduit 20.
- the unit is positioned in an air duct D (Fig. 2) with the fins disposed edgewise to the air stream, and, assuming the tube row [2 (Fig. l) to be the, forward row in respect of the air stream, it will be apparent that it will bear the greatest cooling burden, since air velocity and the heat exchange differential progressively per cent, 33 per cent, and 22 per cent respectively, it will be understood that if each row constituted an individual circuit, as is usual in prior art devices, then with a uniform'refrigerant feed from the header ill, a disproportionate supply condition would be set up.
- I propose to obtain a correct refrigerant feed by dividing the tube rows into a number of coils or zones proportioned in number to the predetermined load factors. Using the above indicated factors, it will be observed that the rows l2, l3, and I4 bear load factors ofapproximately 4/9, 3/9, and 2/9 respectively.
- the row I2 is divided into four individual coils 2
- the second row [3 is provided with three coils or zones (Fig.
- the third row l4 (Fig. 4) is formed into two zones or coils 28, 29 having input extremities 28a, 29a, and outlet extremities 28b, 29b similarly connected to the headers.
- tubing throughout the unit is preferably of a uniform character, it natu- I ,tenance.
- an air cooling unit comprising upper and lower headers, a plurality of vertically disposed and similar rows of tubing mounted transversely in said air duct,
- each row being connected to form a plm'ality or independent coils, the number of coils in each row being different and in direct ratio to the load factors of the rows and means connecting the coils in parallel to the headers.
- an air cooling unit comprising upper and lower headers, a plurality of vertically disposed and similar rows 01' tubing mounted transversely in said air duct,
- each row being parallel to each other, each row being connected to form a plurality of independent coils, the number of coils in each row being different and in direct ratio to the load factors of the rows, input and output extremities secured to each coil and communicating with the headers.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Description
Sept. 15, 1936. sK 2,054,404
REFRIGERATION APPARATUS Filed March 13, 1955 QQ QQQMQQQ Zhwentor Joaga/r Ask/h Gttorneg Patented Sept. 15, 1936 PATENT OFFICE REFRIGERATION APPARATUS Joseph Askin, Buffalo, N. Y., assignor to Fedders Manufacturing Company, Inc., Buffalo, N. Y.
Application March 13, 1935, Serial No. 10,877
2 Claims.
This invention relates to refrigerant evaporation coils which are particularly adapted for use in air conditioning systems.
In modern evaporator practice, it is expedient for proper mass production purposes to form the coils of the unit from tubing of a uniform diameter, thus permitting a tube and fin assembly of a regular character. This practice, however, reduces the thermal efficiency of the unit in systerms where the coils are so disposed as to have different load factors, as other than a uniform feed with this construction has not been obtainable.
In the present invention there is provided a novel manifolding system which permits the utilization of the above mentioned regular construction with the improvement that the effective lengths of the component coils of the unit are varied, to the end that the load factor of each is substantially similar, thus permitting the characteristic uniform feed without inefficiency.
A typical embodiment of the principles of the invention is illustrated in the accompanying.
drawing, wherein:
Fig. l is a side elevation of a cooling unit for an air conditioning system with the input and output headers thereof shown in section.
Figs. 2, 8, and 4 are diagrammatic sectionstaken on the lines 2-2, 33, and 44of Fig. 1.
As shown in the drawing, the cooling unit consists of an upper or feed header ill, a suction header II, and a plurality of interposed cooling coils which are disposed in three vertically disposed rows l2, l3, and ll of horizontal tubes l5 of the same diameter, and connected,as herelnafter described, by loop fittings IS. The tubes "extend through a common set of cross fins l1 and they. are secured thereto.
The unit is connected in the usual refrigerant circuit (not shown) wherein liquid is supplied to the header I0 through a feed conduit l8 under control of a thermostatic expansion valve l9, and, after being permitted to expand in the coils, it is removed from the suction header I I through a suction conduit 20.
The unit is positioned in an air duct D (Fig. 2) with the fins disposed edgewise to the air stream, and, assuming the tube row [2 (Fig. l) to be the, forward row in respect of the air stream, it will be apparent that it will bear the greatest cooling burden, since air velocity and the heat exchange differential progressively per cent, 33 per cent, and 22 per cent respectively, it will be understood that if each row constituted an individual circuit, as is usual in prior art devices, then with a uniform'refrigerant feed from the header ill, a disproportionate supply condition would be set up.
I propose to obtain a correct refrigerant feed by dividing the tube rows into a number of coils or zones proportioned in number to the predetermined load factors. Using the above indicated factors, it will be observed that the rows l2, l3, and I4 bear load factors ofapproximately 4/9, 3/9, and 2/9 respectively. Thus, the row I2 is divided into four individual coils 2|, 22, 23 and 24 (Fig. 2) having input extremities Ha, 22a, 23a, 24a, entering the feed header, and output extremities 21b, 22b, 23b, and 24b, communicating with the suction header II. The second row [3 is provided with three coils or zones (Fig. 3) 25, 26, 21, having input and output extremities 25a, 26a, 21a, and 25b, 26b, and 21b, communicating respectively with the headers Hand l2. The third row l4 (Fig. 4) is formed into two zones or coils 28, 29 having input extremities 28a, 29a, and outlet extremities 28b, 29b similarly connected to the headers.
In operation, since the tubing throughout the unit is preferably of a uniform character, it natu- I ,tenance.
The embodiment which I have described was especially selected because of the relative regularity of the load factors, and it will be understood that in cases where this ideal ratio is not obtainable, the rows may be divided to give a close approximation of the desired ratios, without a noticeable degree of inefiiciency. The invention may also be varied in the precise row disposal and in the number of rows without departing from the inventive concept as set forth in the following claims. a
I claim:
1. In an air cooling system, an air duct, a cooling unit comprising upper and lower headers, a plurality of vertically disposed and similar rows of tubing mounted transversely in said air duct,
each row being connected to form a plm'ality or independent coils, the number of coils in each row being different and in direct ratio to the load factors of the rows and means connecting the coils in parallel to the headers. v
2. In an air cooling system, an air duct, a cooling unit comprising upper and lower headers, a plurality of vertically disposed and similar rows 01' tubing mounted transversely in said air duct,
the tubes in each row being parallel to each other, each row being connected to form a plurality of independent coils, the number of coils in each row being different and in direct ratio to the load factors of the rows, input and output extremities secured to each coil and communicating with the headers.
- JOSEPH ASKIN.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10877A US2054404A (en) | 1935-03-13 | 1935-03-13 | Refrigeration apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10877A US2054404A (en) | 1935-03-13 | 1935-03-13 | Refrigeration apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
US2054404A true US2054404A (en) | 1936-09-15 |
Family
ID=21747838
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10877A Expired - Lifetime US2054404A (en) | 1935-03-13 | 1935-03-13 | Refrigeration apparatus |
Country Status (1)
Country | Link |
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US (1) | US2054404A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2669099A (en) * | 1950-12-29 | 1954-02-16 | Kramer Trenton Co | Evaporator construction for heat exchange systems |
US2791107A (en) * | 1950-10-26 | 1957-05-07 | Kramer Trenton Co | Manifold construction for heat exchange systems |
US2806674A (en) * | 1954-09-02 | 1957-09-17 | Westinghouse Electric Corp | Heat pumps |
US3033535A (en) * | 1957-06-28 | 1962-05-08 | Babcock & Wilcox Ltd | Tubulous heat exchangers |
US4446915A (en) * | 1982-04-14 | 1984-05-08 | The Trane Company | Heat exchanger tube circuits |
US4483392A (en) * | 1982-04-01 | 1984-11-20 | Xchanger, Inc. | Air to air heat exchanger |
US4690209A (en) * | 1985-03-18 | 1987-09-01 | Martin Cory I | Air conditioner evaporator system |
US20060153551A1 (en) * | 2003-01-31 | 2006-07-13 | Heinz Schilling | Air/water heat exchanger with partial water ways |
US20070240445A1 (en) * | 2006-04-14 | 2007-10-18 | Baltimore Aircoil Company, Inc. | Heat transfer tube assembly with serpentine circuits |
-
1935
- 1935-03-13 US US10877A patent/US2054404A/en not_active Expired - Lifetime
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2791107A (en) * | 1950-10-26 | 1957-05-07 | Kramer Trenton Co | Manifold construction for heat exchange systems |
US2669099A (en) * | 1950-12-29 | 1954-02-16 | Kramer Trenton Co | Evaporator construction for heat exchange systems |
US2806674A (en) * | 1954-09-02 | 1957-09-17 | Westinghouse Electric Corp | Heat pumps |
US3033535A (en) * | 1957-06-28 | 1962-05-08 | Babcock & Wilcox Ltd | Tubulous heat exchangers |
US4483392A (en) * | 1982-04-01 | 1984-11-20 | Xchanger, Inc. | Air to air heat exchanger |
US4446915A (en) * | 1982-04-14 | 1984-05-08 | The Trane Company | Heat exchanger tube circuits |
US4690209A (en) * | 1985-03-18 | 1987-09-01 | Martin Cory I | Air conditioner evaporator system |
US20060153551A1 (en) * | 2003-01-31 | 2006-07-13 | Heinz Schilling | Air/water heat exchanger with partial water ways |
US20070240445A1 (en) * | 2006-04-14 | 2007-10-18 | Baltimore Aircoil Company, Inc. | Heat transfer tube assembly with serpentine circuits |
US7779898B2 (en) * | 2006-04-14 | 2010-08-24 | Baltimore Aircoil Company, Inc. | Heat transfer tube assembly with serpentine circuits |
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