US2578906A - Refrigeration apparatus - Google Patents
Refrigeration apparatus Download PDFInfo
- Publication number
- US2578906A US2578906A US108959A US10895949A US2578906A US 2578906 A US2578906 A US 2578906A US 108959 A US108959 A US 108959A US 10895949 A US10895949 A US 10895949A US 2578906 A US2578906 A US 2578906A
- Authority
- US
- United States
- Prior art keywords
- tube
- refrigerant
- evaporator
- liquid
- header
- 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
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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
- F25D11/022—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures with two or more evaporators
-
- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2700/00—Means for sensing or measuring; Sensors therefor
- F25D2700/10—Sensors measuring the temperature of the evaporator
Definitions
- This invention relates to refrigeration apparatus and more especially to a refrigerator havin a number of chambers maintained at dverent temperatures.
- Fig. 1 is a view in perspective of a refrigerator cabinet having two food storage compartments
- Fig. 2 is a view in perspective of the refrigerating coils of this invention and a phantom view of the inner liner of the refrigerator of Fig. 1 to which liner the coils are secured.
- Fig. 2 also shows the refrigerating apparatus which supplies these coils with a volatile refrigerant liquid.
- the reference numeral Ill designates a refrigerator cabinet having an inner metal liner l2 separated into two food storage compartments l4 and It by a horizontal partition II.
- the lower compartment l6 is refrigerated by a metal tube secured to the outer surface of the metal food liner l2.
- This tube2ll is convoluted along the bottom wall and extends upwardly along the 'side and rear walls of the compartment It.
- a suction conduit 22 connects the header 24 with the interior of a sealed casing 28 which encloses a refrigerant compressor 30 and an electric motor 22 for driving the same.
- a quantity of lubricating oil 241s also located in the casing vapor from the interior of the casing 28 through an inlet port 38, compresses the vapor and passes it through a conduit 38 to an air-cooled condenser 40 wherein the refrigerant vapor is liquefied.
- the liquefied refrigerant vapor then passes through a capillary tube 42 into the tube 20.
- the capillary tube 42 is the only pressure reducing device in the refrigeration apparatus.
- the motor 32 is energized from a source of electric power through leads 44, and a thermostatic switch 46 is located in one of the leads 44.
- the thermostatic switch 46 is controlled by a temperature-sensitive element comprising a bulb 48 containing a volatile liquid and a tube 5H for transmitting the vapor pressure of this liquid to the mechanism of the switch 46.
- the thermostatic switch 48 is arranged to close when the vapor pressure of the volatile liquid rises above a predetermined limit and to open when this pressure drops to a predetermined limit which is lower than the first-named predetermined limit.
- the vapor pressure is responsive to the temperature of the bulb 48.
- refrigerant liquid will be supplied through the capillary tube 42 to one end of the conduit 20.
- the compressor 30 continues in operation, some of the refrigerant vapor formed in tube 20 will carry refrigerant liquid along with it into the tube 22 where this refrigerant liquid commences to vaporize and cool the compartment [6.
- Some of the refrigerant liquid in the tube 22 will be carried downwardly into the header 24 to replace the liquid which has vaporized therein.
- the bulb 48 has been cooled'by the continued vaporization of the refrigerant liquid in the tube 22 to the predetermined temperature at which the switch 46 opens, the compressor 30 will stop and a period of inactivity ensues, during which the refrigerant liquid drains from the tube 22.
- this invention provides a simple refrigerating system for maintainin several food storage compartments at different refrigerating temperatures.
- a refrigerator having a first and a second food storage chamber, a first evaporator adapted to cool said first chamber, a second evaporator adapted to cool said second chamber, said first and second evaporators being connected in series, refrigerant compressing and condensing apparatus for supplying said first evaporator with liquid refrigerant and for withdrawing refrigerant vapor from said second evaporator and means for actuating said apparatus intermittently to maintain the temperature of said second chamber between predetermined limits, said second evaporator being located above said first evaporator, said second evaporator comprises a tube having a flow area smaller than the flow area of said first evaporator, the construction and arrangement being such that the velocity of the gaseous refrigerant entering the tube during active periods of the compressing and condensing apparatus is increased to a value at which liquid refrigerant is carried in suspension in the gaseous refrigerant entering the tube, said tube being inclined for the gravitational flow of liquid refrigerant to the first
- said tube being located above said first evaporator and said header and forming an evaporator for cooling said second chamber, refrigerant compressing and condensing apparatus for supplying refrigerant liquid to said first evaporator and for withdrawing refrigerant vapor from said header and means for actuating said apparatus intermittently to maintain the temperature of said second chamber between predetermined limits, said tube having a flow area smaller than the fiow area of said first evaporator, the construction and arrangement being such that the velocity of the gaseous refrigerant entering the tube during active periods of the compressing and condensing apparatus is increased to a value at which liquid refrigerant is carried in suspension in the gaseous refrigerant entering the tube, said tube being inclined for the gravitational fiow of liquid refrigerant to the first evaporator and the header during inactive periods of the compressing and condensing apparatus.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Description
Dec. 18, 1951 TOBEY REFRIGERATION APPARATUS Filed Aug. 6, 1949 INVENTOR RAYMOND E TOBEY Q WITNESSES: yfi/W 41%;;
ATTORNEY Patented Dec. 18, 1951 REFRIGERATION APPARATUS Raymond E. Tobey, Springfield, Mass., assignor to Westinghouse Electric Corporation, East Pittsburgh, Pa., a corporation of Pennsylvania Application August 6, 1949, Serial No. 108,959
3 Claims. (Cl. 62-1173) This invention relates to refrigeration apparatus and more especially to a refrigerator havin a number of chambers maintained at diilerent temperatures.
It is an object of this invention to provide a simple refrigeration system adapted to maintain a plurality of food storage chambers at different refrigerating temperatures.
These and other objects are effected by my invention as will be apparent from the following description and claims taken in connection with the accompanying drawings, forming a part of this application, in which:
Fig. 1 is a view in perspective of a refrigerator cabinet having two food storage compartments; and
Fig. 2 is a view in perspective of the refrigerating coils of this invention and a phantom view of the inner liner of the refrigerator of Fig. 1 to which liner the coils are secured. Fig. 2 also shows the refrigerating apparatus which supplies these coils with a volatile refrigerant liquid.
Referring to the drawings, the reference numeral Ill designates a refrigerator cabinet having an inner metal liner l2 separated into two food storage compartments l4 and It by a horizontal partition II. The lower compartment l6 is refrigerated by a metal tube secured to the outer surface of the metal food liner l2. This tube2ll is convoluted along the bottom wall and extends upwardly along the 'side and rear walls of the compartment It.
The tube 20 communicates with a smaller tube 22 at about the elevation of the partition is. The tube 22 extends upwardly along the rear wall of the liner I2 of the compartment l4 and .-then passes sidewardly along the rear wall and the side walls of the upper compartment l4. The tube then descends downwardly along one of the side walls to a refrigerant header 24 located on the side wall of the lower compartment is. The refrigerant header 24 separates the refrigerant liquid from the refrigerant vapor and also cools the lower compartment It. The sldewardly extending loops of the tube 22 are sloped to drain into the tube 20 and are of sufiicient size to afford such draining. Tube 20 is sufllciently large to hold all of the refrigerant liquid draining into it.
A suction conduit 22 connects the header 24 with the interior of a sealed casing 28 which encloses a refrigerant compressor 30 and an electric motor 22 for driving the same. A quantity of lubricating oil 241s also located in the casing vapor from the interior of the casing 28 through an inlet port 38, compresses the vapor and passes it through a conduit 38 to an air-cooled condenser 40 wherein the refrigerant vapor is liquefied. The liquefied refrigerant vapor then passes through a capillary tube 42 into the tube 20. The capillary tube 42 is the only pressure reducing device in the refrigeration apparatus.
The motor 32 is energized from a source of electric power through leads 44, and a thermostatic switch 46 is located in one of the leads 44. The thermostatic switch 46 is controlled by a temperature-sensitive element comprising a bulb 48 containing a volatile liquid and a tube 5H for transmitting the vapor pressure of this liquid to the mechanism of the switch 46. The thermostatic switch 48 is arranged to close when the vapor pressure of the volatile liquid rises above a predetermined limit and to open when this pressure drops to a predetermined limit which is lower than the first-named predetermined limit. The vapor pressure is responsive to the temperature of the bulb 48.
The refrigerant tube 20 is coiled along the bottom of the lower compartment to provide a Operation Since the refrigerant compressor 90 is started and stopped in response to the temperature of the bulb 48, the compressor 30 will have periods of activity and inactivity. During the inactive period, following an active period, the refrigerant liquid in the tube 22 drains into the tube 20 and into the header 24, so that the tube 22 is devoid of refrigerant liquid at the, start of the next active period.
' liquid in the header 24 and in the tube 2! ya- 28. The compressor 20 withdraws refrigerant porizes and cools the lower compartment ll.
After a short period of time, refrigerant liquid will be supplied through the capillary tube 42 to one end of the conduit 20. As the compressor 30 continues in operation, some of the refrigerant vapor formed in tube 20 will carry refrigerant liquid along with it into the tube 22 where this refrigerant liquid commences to vaporize and cool the compartment [6. Some of the refrigerant liquid in the tube 22 will be carried downwardly into the header 24 to replace the liquid which has vaporized therein. When the bulb 48 has been cooled'by the continued vaporization of the refrigerant liquid in the tube 22 to the predetermined temperature at which the switch 46 opens, the compressor 30 will stop and a period of inactivity ensues, during which the refrigerant liquid drains from the tube 22.
During each period of activity of the compressor 36 the lower compartment I6 is thus refrigerated during substantially the total length 'of the active period while the upper compartment I4 is cooled only during the latter part of the period. This, together with the high percentage of wall surface of compartment l6 that is refrigerated compared to that of compartment l4 accounts for the lower temperature in the com partment l6. Compartment I6 is thus suitable for the freezing of foods and the storage of frozen foods, whereas the compartment I4 is maintained at a temperature suitable for ordinary refrigerated storage at a temperature of about 40 degrees F.
It will be apparent from the above that this invention provides a simple refrigerating system for maintainin several food storage compartments at different refrigerating temperatures.
While I haveshown the invention in but one form, it will be obvious to those skilled in the art that it is not so limited, but is susceptible of various changes and modifications without departing from the spirit thereof.
What I claim is: A v
1. In a refrigerator having a first and a second food storage chamber, a first evaporator adapted to cool said first chamber, a second evaporator adapted to cool said second chamber, said first and second evaporators being connected in series, refrigerant compressing and condensing apparatus for supplying said first evaporator with liquid refrigerant and for withdrawing refrigerant vapor from said second evaporator and means for actuating said apparatus intermittently to maintain the temperature of said second chamber between predetermined limits, said second evaporator being located above said first evaporator, said second evaporator comprises a tube having a flow area smaller than the flow area of said first evaporator, the construction and arrangement being such that the velocity of the gaseous refrigerant entering the tube during active periods of the compressing and condensing apparatus is increased to a value at which liquid refrigerant is carried in suspension in the gaseous refrigerant entering the tube, said tube being inclined for the gravitational flow of liquid refrigerant to the first evaporator during inactive periods of the compressing and condensins apparatus.
-header, said tube being located above said first evaporator and said header and forming an evaporator for cooling said second chamber, refrigerant compressing and condensing apparatus for supplying refrigerant liquid to said first evaporator and for withdrawing refrigerant vapor from said header and means for actuating said apparatus intermittently to maintain the temperature of said second chamber between predetermined limits, said tube having a flow area smaller than the fiow area of said first evaporator, the construction and arrangement being such that the velocity of the gaseous refrigerant entering the tube during active periods of the compressing and condensing apparatus is increased to a value at which liquid refrigerant is carried in suspension in the gaseous refrigerant entering the tube, said tube being inclined for the gravitational fiow of liquid refrigerant to the first evaporator and the header during inactive periods of the compressing and condensing apparatus.
3. In a refrigerator having a first and a second food storage chamber, a first evaporator, a refrigerant header, said first evaporator and refrigerant header being arranged to cool said first chamber, a tube connected at one end with said first evaporator and at its other end with said header, said tube being located above said first evaporator and said header and forming an evaporator for cooling said second chamber, refrigerant compressing and condensing apparatus for supplying refrigerant liquid to said first evaporator and for withdrawing refrigerant vapor from said header and means for actuating said apparatus intermittently to maintain the temperature of said second chamber between predetermined limits, said tube having a flow area smaller than the fiow area of said first evaporator,
RAYMOND E. TOBEY.
REFERENCES crran The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 1,439,051 Anderson Dec. 19, 1922 2,345,714 Philipp Apr. 4, 1944 2,446,946 Norton, l Aug. 10, 1948
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US108959A US2578906A (en) | 1949-08-06 | 1949-08-06 | Refrigeration apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US108959A US2578906A (en) | 1949-08-06 | 1949-08-06 | Refrigeration apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
US2578906A true US2578906A (en) | 1951-12-18 |
Family
ID=22325049
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US108959A Expired - Lifetime US2578906A (en) | 1949-08-06 | 1949-08-06 | Refrigeration apparatus |
Country Status (1)
Country | Link |
---|---|
US (1) | US2578906A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2697916A (en) * | 1953-06-03 | 1954-12-28 | Seeger Refrigerator Co | Multiple temperature household refrigerator and method of refrigeration |
US2720757A (en) * | 1952-01-04 | 1955-10-18 | Gen Motors Corp | Two temperature refrigerating apparatus |
US2741095A (en) * | 1952-10-07 | 1956-04-10 | Gen Motors Corp | Refrigeratior having multiple section evaporator |
US2762888A (en) * | 1953-09-10 | 1956-09-11 | Gen Motors Corp | Refrigerating apparatus |
US2769319A (en) * | 1952-02-18 | 1956-11-06 | Whirlpool Seeger Corp | Two temperature household refrigerators |
DE1019330B (en) * | 1952-01-04 | 1957-11-14 | Gen Motors Corp | Household refrigerator with two cooling compartments |
US2859595A (en) * | 1954-03-25 | 1958-11-11 | Gen Motors Corp | Two temperature refrigerator with forced air circulation |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1439051A (en) * | 1918-01-22 | 1922-12-19 | Anderson Rees Refrigerating Ma | Refrigerating apparatus |
US2345714A (en) * | 1940-08-08 | 1944-04-04 | Nash Kelvinator Corp | Refrigerating apparatus |
US2446946A (en) * | 1943-03-08 | 1948-08-10 | Admiral Corp | Two-temperature refrigeration system |
-
1949
- 1949-08-06 US US108959A patent/US2578906A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1439051A (en) * | 1918-01-22 | 1922-12-19 | Anderson Rees Refrigerating Ma | Refrigerating apparatus |
US2345714A (en) * | 1940-08-08 | 1944-04-04 | Nash Kelvinator Corp | Refrigerating apparatus |
US2446946A (en) * | 1943-03-08 | 1948-08-10 | Admiral Corp | Two-temperature refrigeration system |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2720757A (en) * | 1952-01-04 | 1955-10-18 | Gen Motors Corp | Two temperature refrigerating apparatus |
DE1019330B (en) * | 1952-01-04 | 1957-11-14 | Gen Motors Corp | Household refrigerator with two cooling compartments |
US2769319A (en) * | 1952-02-18 | 1956-11-06 | Whirlpool Seeger Corp | Two temperature household refrigerators |
US2741095A (en) * | 1952-10-07 | 1956-04-10 | Gen Motors Corp | Refrigeratior having multiple section evaporator |
US2697916A (en) * | 1953-06-03 | 1954-12-28 | Seeger Refrigerator Co | Multiple temperature household refrigerator and method of refrigeration |
US2762888A (en) * | 1953-09-10 | 1956-09-11 | Gen Motors Corp | Refrigerating apparatus |
US2859595A (en) * | 1954-03-25 | 1958-11-11 | Gen Motors Corp | Two temperature refrigerator with forced air circulation |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2487182A (en) | Two-temperature refrigerator having means for defrosting | |
US2605621A (en) | Series connected ice maker and water cooler | |
US2462240A (en) | Two-temperature refrigerator system | |
US2287681A (en) | Refrigerating device for bottled | |
US2302051A (en) | Refrigerating apparatus | |
US2416777A (en) | Multiple temperature refrigerator | |
US2133948A (en) | Refrigeration apparatus | |
US2435102A (en) | Removable secondary cooling unit for refrigerator evaporators | |
US2292405A (en) | Refrigerating apparatus | |
US2578906A (en) | Refrigeration apparatus | |
US2944410A (en) | Refrigerating apparatus | |
US2640327A (en) | Dual evaporator refrigeration apparatus | |
US2663999A (en) | Household refrigerator | |
US2484588A (en) | Refrigerating apparatus having a freezing chamber and a storage chamber | |
US2442978A (en) | Refrigeration apparatus having frost localizing means | |
US2755634A (en) | Two-temperature refrigerating apparatus | |
US2483842A (en) | Two-temperature refrigeration system using two refrigerants | |
US2741095A (en) | Refrigeratior having multiple section evaporator | |
US2291559A (en) | Refrigerating apparatus | |
US2329139A (en) | Refrigerating apparatus | |
US2859595A (en) | Two temperature refrigerator with forced air circulation | |
US2432931A (en) | Refrigerated evaporator shelf | |
US1955087A (en) | Refrigerating apparatus | |
US2219789A (en) | Refrigerator | |
US2436945A (en) | Two temperature absorption refrigerating apparatus and method |