US2753695A

US2753695A - Mechanical refrigerator

Info

Publication number: US2753695A
Application number: US384667A
Authority: US
Inventors: James A Maranto
Original assignee: Individual
Current assignee: Individual
Priority date: 1953-10-07
Filing date: 1953-10-07
Publication date: 1956-07-10
Anticipated expiration: 1973-07-10

Description

J. A. MARANTO 4 Sheets-Sheet l July l0, 1956 MECHANICAL REFRIGERATOR Filed oct. 7. 1955 my MW d A U M @AUM 4 5 0 Vw Ww WI ,o ...ag/ 9 ,w :z: 2 Q 5:. o, y t. xw

July 10, 1956 J. A. MARANTO 2,753,695

MECHANICAL REFRIGERATOR Filed Oct. '7, 1955 4 Sheets-Sheet 2 July l0, 1956 J. A. MARANTQ 2,753,695

MECHANICAL REFRIGERATOR Filed Oct. 7, 1953 4 Sheets-Sheet 3 5&5

/ l l l, l I l l! 26 f f 2Q /10 e Z7 55 2;

:l 36 i/ j? j@ 476 \I\ ,J4

l 'H l V- L ii ll H. ULA 1 @275 Jag 7m/70 July 10, 1956 J. A. MARANTO 2,753,695

MECHANICAL REFRIGERATOR Filed Oct. '7, 1953 4 Sheets-Sheet 4 nited States Patent MECHANICAL REFRIGERATOR `lames A. Maranto, Chicago, Ill.

Application October 7, 1953, Serial No. 384,667

6 Claims. (Cl. 62--116) The present invention relates generally to mechanical refrigerators. More particularly the invention relates to that type of mechanical refrigerator which is designed primarily for use in a home or store, serves as a medium or instrumentality for storing food products and beverages in a refrigerated atmosphere, and as its principal parts or components comprises: (1) a vertically elongated cabinet in the form of a hollow open front body which has the interior thereof divided into a large sized upper storage compartment and a small sized lower compartment and embodies a hinged door for closing the open front thereof; (2) a motor-compressor-condenser-receiver unit which is mounted removably in the lower compartment; and (3) a hollow evaporator unit which is mounted removably in the upper storage compartment, forms a low temperature or freezing chamber and has one end of the coil thereof connected by a exible tube to the receiver and the other end of the coil connected by a flexible tube to the suction side of the compressor.

In a refrigerator of this type it has heretofore been proposed to form the sides, back and top of the body of the cabinet and the door for closing the open front of the body of spaced apart outer and inner walls and to fill the spaces between such walls with cork, asbestos or like material in order to insulate from the ambient air the large sized upper storage compartment in the body. In practice it has been found that a refrigerator, the upper storage compartment of which is insulated in the aforementioned manner does not possess high efficiency because of the comparatively high rate of heat absorption on the part of the sides, back and top of the body of the cabinet and the door for closing the open front of the body.

One object of the invention is to provide a refrigerator which is an improvement upon, and is more efcient than, previously designed refrigerators of the same general type and is characterized by the fact that it embodies novel highly efficient means for insulating the upper storage compartment in the body and also novel highly eicient means for insulating the hinged door.

Another object of the invention is to provide a mechanical refrigerator in which the means for insulating the upper storage compartment in the body of the cabinet is in the form of a hollow open front hermetically sealed cup-shaped shell which comprises outer and inner spaced apart walls, has the space within its walls evacuated of air, i. e., placed under vacuum, is so formed that the inner wall thereof defines the large sized upper storage compartment, and is insertable into, and removable from, the central and upper portions of the interior of the cabinet body via the front opening in the body.

Another object of the invention is to provide a refrigerator of the last mentioned character in which the front part of the body has simple and novel readily releasable means for securing the shell in its operative position and the top portion of the shell has associated with it means for removably mounting the evaporator unit.

ICC

A further object of the invention is to provide a mechanical refrigerator of the type and character under consideration in which the high eiciency means for insulating the hinged door is in the form of a hollow hermetically sealed shell which consists of outer and inner spaced apart walls, has the space between the walls evacuated of air, i. e., placed under vacuum, and is mounted on the inside portion of the door so that it may be readily removed for purposes of repair or replacement.

A still further object of the invention is to provide a mechanical refrigerator which is generally of new and improved construction, embodies a novel arrangement of parts and, due to the particular insulating means for the storage compartment and the hinged door, possesses extremely high eiciency.

Other objects of the invention and the various advantages and characteristics of the present refrigerator will be apparent from a consideration of the following detailed description.

The invention consists in the several novel features which are hereinafter set forth and are more particularly defined by claims at the conclusion hereof.

In the drawings which accompany and form a part of this specification or disclosure and in which like numerals of reference denote corresponding parts throughout the several views:

Figure l is a front perspective of a mechanical refrigerator embodying the invention, the hinged door of the body of the cabinet being shown in its open position;

Figure 2 is a vertical section illustrating in detail the arrangement and design of the motor-compressor-condenser-receiver unit in the lower compartment in the body of the cabinet and the construction and manner of mounting of the evaporator unit in the upper portion of the storage compartment in the cup-shaped shell;

Figure 3 is a horizontal section. taken on the line 3 3 of Figure 2, illustrating in detail the cross sectional construction of the hollow open front hermetically sealed cup-shaped shell in the cabinet body and the shell on the inside portion of the hinged door, and showing the manner in which the shell in the body is removably secured in place;

Figure 4 is an enlarged horizontal section of one of the side portions of the substantially rectangular frame which serves releasably to secure the hollow open front hermetically sealed cup-shaped shell in its operative position in the central and upper portions of the interior of the body of the cabinet of the refrigerator;

Figure 5 is a front perspective showing the evaporator unit after it has been disconnected and removed from its operative position and also showing the cup-shaped shell after it has been partially removed from the cabinet body of the refrigerator;

Figure 6 is a horizontal section of the hollow hinged door without the hollow hermetically sealed shell therein;

Figure 7 is a horizontal section of the shell constituting the high eiciency means for insulating the door; and

Figure 8 is a vertical section on the line 8 8 of Figure l.

The refrigerator that is shown in the drawings constitutes the preferred form or embodiment of the invention. It is designed primarily for use in a home or store and serves as a medium or instrumentality for storing food products and beverages in a refrigerated atmosphere. As`

its principal parts or components the refrigerator comprises a vertically elongated cabinet 10, a motorcompressor-condenser-receiver unit 11, and an evaporator unit 12.

The cabinet 10 consists of a hollow open front body 13 and a hollow door 14 for closing the open front of the body.

The body 13 of the cabinet 1t) comprises a pair of spaced apart sides 15, a back 16 and a top 17, all of which are formed of sheet metal. The sides 15 extend vertically and have the front margins thereof bent inwards at right angles to form inwardly extending ilanges 18. The back 16 is vertically positioned and extends between, and serves to space apart, the sides 15. The side margins of the back are suitably joined or connected to the rear side margins of the sides 15. The top 17 serves as a closure for the upper end of the interior of the body and has its side margins suitably connected to the upper end margins of the sides 15. The rear margin of the top 17 is suitably connected or joined to the upper end margin of the back 16 and the front margin of the top is bent downwards at right angles so as to form a depending ange 19. The ange 19 lies in the same vertical plane as the anges 18 and has its ends connected to the upper ends of the flanges 1S. Within the lower portion of the interior of the body 13 of the cabinet is a horizontal partition 20. The latter is supported at the side margins thereof by way of a pair of horizontally extending angle bars 21 and denes with the lower portions of the sides 15 and the lower portion of the back 16 a small sized lower compartment 22 in which the motor-compressor-condenser-receiver unit 11 is mounted. rl`he front of the compartment 22 is closed by a horizontally elongated hollow front section 23,*the ends of which are suitably secured to the lower portions of the inwardly extending flanges 18 on the front side margins of the sides 15. The angle bars 21 are suitably secured to the lower portions of the sides 15 and support a pair of horizontal rails 24, the purpose of which will be described hereafter. Mounted removably in the portion of the body interior that overlies the horizontally extending partition 2l) is a hollow open front hermetically sealed cup-shaped shell 25. The latter consists of a cup-shaped outer wall 26, a cup-shaped inner wall 27 in spaced relation with the outer wall 26 and a rectangular front wall 28. The outer wall 26 of the shell 25 is for all intents and purposes imperforate and consists of a pair of opposed side portions, a bottom portion, a back portion and a top portion. The inner wall 27 is the same in shape as, but is of less size than, the outer wall 26 and consists of a pair of opposed side portions, a bottom portion, a back portion and a top portion. The rectangular front wall 28 serves as a closure for the front of the shell 25 and has its outer margin connected to the front margins of the side, bottom and top portions of the cup-shaped outer wall 26. The inner margin of the front wall 28 is suitably joined or connected to the front margins of the side, bottom and top portions of the inner wall 27. The inner wall 27 of the shell 2S defines a large sized storage compartment 29 for food products, beverages and other items that are to be retained in a refrigerated atmosphere in the refrigera tor cabinet. Vertically spaced horizontal trays 30 extend across the compartment 29 and serve to support the various articles that are to be kept in a refrigerated condition by the refrigerator. The side margins of the trays rest on, and are supported by, brackets 31, certain parts of which are welded or otherwise tixedly secured to the side portions o-f the inner wall 28 of the shell 25. As shown in the drawings, the shell, when in its operative position, occupies substantially all of the portion of the body interior that overlies the horizontally extending partition 20. The space within the outer, inner and front walls of the shell is evacuated of air in order that the shell as a whole has extremely high insulating properties. It is contemplated that after the shell is fabricated the air in the space within the aforementioned walls will be evacuated by way of a suction pump or any similar means for creating a vacuum. The shell 2S is adapted to be inserted into its operative position by shifting it laterally through the open front of the body 13. It is also adapted to be removed as a unit for repair or replacement purposes. Removal of the shell `is effected by shifting the shell forwards through the open front of the body. The lower corners of the side portions of the outer wall 26 of the shell 25 are provided with rollers 32 which, when the shell is in its operative position, rest on the rails .24. Such rollers are rotatably mounted on horizontally extending spindles 33 and facilitate sliding of the shell into and out of its operative position. The outer and

inner walls

26 and 27 of the shell are reenforced by vertically extending plates 3d in order to prevent them from collapsing due to the vacuum in the shell 25. Such plates have holes 35 therein and extend between the side portions of the outer and

inner walls

26 and 27 of the shell. The outer, inner and front walls of thc shell Z5 and the aforementioned reenforcing plates are preferably formed of sheet metal. A rectangular frame 36 serves releasably to hold the shell in its operative position. Such frame is preferably in the form of a sheet metal stamping and comprises an intermediate web 37, an integral outwardly extending flange 3E on the outer margin of the web and an inwardly extending flange 39 on the inner margin of the web. The side portions of the outwardly extending flange 33 fit against the portions of the flanges 1li that extend above the partition il@ and are removably secured thereto by way of screws ill. Tl e upper portion of thc outwardly extending flange 38 tits against the depending flange 1') on the front margin of the top 17 of the cabinet body 13 and is removably secured thereto by way of screws 41. The bottom portion of the flange 33 rits against the front surface of the partition 29 and is removably secured thereto by way of screws 42. The inwardly extending flange 39 of the frame 36 is shaped conformably to, and fits snugly within, the front margins of the side, bottom and top portions of the inner wall 27 of the shell 25.

hen it is desired to remove the shell for repair or replacement purposes the screws di), 41 and 4Z are removed so as to release the frame 36. Thereafter the frame is shifted forwards in order to free the shell. After forward shift of the frame the shell 25 may be removed by sliding it outwardly as a unit through the open front of the body 13. In connection with installation of the shell the shell is slid rearwards into its operative position and thereafter the frame 36 is mounted and secured in its operative position wherein it is disposed directly forwards of the rectangular front wall 23 of the shell.

The door 14 of the cabinet 19 is hollow and serves as a closure for the open front of the body 13. lt is preferably formed of sheet metal and comprises a rectangular outer wall 43, a rectangular inner wall le and a LJ-shaped side wall 45. The U-shaped side wall 45 of the door extends between, and is suitably secured to, the side and bottom margins of the outer and inner walls '13 and 414 and defines therewith an open top compartment do. The door 14 is supported by a pair of hinges d'7 in order that it may be swung into and out of its closed position. eitain parts of the hinges 47 are connected to the front margin of one of the sides 15 of the body 13 and certain other parts of the hinges are secured to one of the side portions of the U-shaped sidewall 45 of the door. The marginal portion of the inner wall 44 of the door is provided with a continuous recess 48 in which fits a gasket 49 of rubber or like material. When the door is in its closed position, as shown in Figure 3 of the drawings, the gasket 49 fits tightly against the outwardly extending ange 38 of the removable frame 36. Disposed within the open top compartment 4o in the door 14 is a hollow hermetically sealed shell 50. The latter is shaped conformably to, and tits snugly within, the compartment 46 and consists of an outer wall 51, an inner wall 52 and a continuous side wall 53. Such walls are preferably formed of sheet metal. The continuous side Wall 53 extends between, and is suit` ably secured to, the marginal portion of the outer and inner walls S1 and 52. The space within the hollow shell 50 is evacuated of air in the same manner as the shell 25 and hence the shell di), when in its operative position, forms a highly ecient insulating medium for the hollow door A14.V The outer and inner walls of the shell 50 are reenforced against collapse by way of vertically extending hole equipped sheet metal plates 54. The outer margins of such plates are welded or otherwise iixedly secured to the adjacent portions of the inner surface of the outer wall 51 of the shell 50 and the inner side margins of the plates 54 are suitably secured to the adjacent portions of the inner surface of the inner wall 52. The shell 50 is inserted into the compartment 46 in the door 14 by sliding it downwards through the open top of the compartment. In the event that it is necessary to replace or repair the shell 50 the latter is slid upwards through the open top of the compartment.

The unit 11 is mounted removably in the small sized lower compartment 22 in the body 13 of the cabinet 10 and is of conventional or standard design. It is insertable into, and removable from, the compartment 22 via the latters open front when the front section 23 is removed from its operative position. As its parts or components the unit 11 comprises an electric motor 55, a compressor 56, a condenser 57 and a receiver 58. The motor 55 is supplied with current by way of conductors 59 and serves to drive the rotor of the compressor 56. The latter is connected by way of a pipe or conduit 60 to supply refrigerant under pressure to the condenser 57. The condenser is of the air cooled type and has its discharge end connected to the receiver 57 by way of a pipe or conduit 61.

The evaporator' unit 12 is located in the upper portion of the storage compartment 29 in the shell 25 and consists of a box-like door equipped housing 62 and an evaporator coil 63 around the housing. One end of the coil 63 is connected to the receiver S by way of a exible tube 64 and the other end of the evaporator coil is connected to the suction side of the motor driven compressor 56 by way of a exible tube 65. The central portions of the

tubes

64 and 65 extend vertically and are disposed in the space between one side portion of the removable frame 36 and the adjacent side portion of the rectangular front wall 28 of the shell 25, as shown in Figures 3 and 4. The lower ends of the

tubes

64 and 65 extend through a hole 66 in the horizontal partition 20 and the upper ends of the two tubes extend through a slot in the upper end of one side portion of the frame 36. The evaporator unit 12 of the refrigerator is removably mounted by way of a plurality of vertically extending bolts 67. The latter comprise Shanks 68 and heads 69 at the lower ends of the Shanks. The head equipped ends of the Shanks of the bolts 67 extend through holes 70 in the top wall of the box-like housing 62 of the evaporator unit 12. The Shanks of the bolts extend upwards and slidably through sleeves 71 and have the upper ends thereof disposed within nuts 72. The sleeves 71 extend through vertically aligned holes in the upper portions ofthe outer and inner walls of the shell 25 and have the ends thereof welded or otherwise suitably secured to the hole defining portions of said upper portions of the outer and inner walls of the shell 25. The nuts 72 are welded to the inner surface of the top 17 of the cabinet body 13 of the refrigerator.

When it is desired to remove the shell 25 from the body 13 of the refrigerator cabinet 1t) the rectangular shell retaining frame 36 is first removed. This, as previously pointed out, is accomplished by unscrewing the

screws

46, 41 and 42 and then shifting the frame 36 forwards. After removal of the frame the bolts 67 are unscrewed from the nuts 72 and then slid downwards in order to release the evaporator unit 12. Thereafter the evaporator unit is shifted forwards and then to one side, as shown in dotted lines in Figure 5. Such shifting on 'the part of the evaporator unit is permitted because of the flexibility of the

tubes

64 and 65. After removal of the evaporator unit the shell 25 is slid forwards until it is clear of the body 13 of the refrigerator cabinet 10. Installation of the shell 25 is effected by first sliding the shell rearwards into place via the open front of the body 13. After the shell is slid into place the evaporator unit 6` 12 is manipulated into the upper portion of the storage compartment 29 in the shell 25 and is then secured in place by way of the bolts 67. After the evaporator unit is secured in place the rectangular frame 26 is mounted in its operative position and then secured in place by way of the

screws

40, 41 and 42.

The herein described refrigerator possesses extremely high efficiency and this is directly attributable to the fact that it includes the hollow hermetically

sealed shells

25 and 50. Such shells, due to the vacuums therein, possess extremely low heat conductivity and, therefore, the storage space 29 within the Shell 25 can be maintained at a low temperature without excessive work on the part of the motor-compressor-condenser-receiver unit 11 in the small sized lower compartment 22 in the body 13. The two shells, due to the particular manner in which they are mounted, may be readily removed in the event that it is necessary to repair or replace them.

The invention is not to be understood as restricted to the details set forth since these may be modified within the scope of the appended claims without departing from the spirit and scope of the invention.

Having thus described the invention what I claim as new and desire to secure by Letters Patent is:

l. A mechanical refrigerator comprising a cabinet in the form of a hollow body consisting of sides, a back and a top, having the interior thereof divided into an upper compartment and a lower compartment, and embodying in its front portion a full sized opening leading to the upper compartment, and a door hinged to one of the sides of the body and adapted to swing into and out of a closed position wherein it closes the opening, a hollow open front hermetically sealed cup-shaped shell shaped conformably to, and disposed normally in, the upper compartment, adapted to slide bodily into and out of place via the aforementioned opening, embodying outer and inner spaced apart cup-shaped walls and a rectangular front wall between the front margins of the outer and inner walls, having the space within its walls evacuated of air, and having the inner wall thereof defining an open front storage space for articles to be refrigerated, a motor-compressor-condenser-receiver unit mounted in the lower compartment, and an evaporator unit formed separately from the shell, disposed normally wholly within said storage space in the shell, provided with releasable mounting means therefor, embodying an evaporator coil, having the ends of the coil connected respectively to the receiver and the suction side of the compressor by liexible tubes, and adapted when the door is out of its closed position and its mounting means are released to be removed bodily through the open front of said storage space in order to permit the shell to be removed via the opening in the front portion of the body.

2. A mechanical refrigerator comprising a vertically elongated cabinet in the form of a hollow body consisting of sides, a back and a top, having the interior thereof divided into a large sized upper compartment and a small sized lower compartment, and embodying in its front portion a full sized opening leading to the upper compartment, and a door hinged to one of the sides of the body and adapted to swing into and out of a closed position wherein it closes the opening, a hollow open front hermetically sealed cup-shaped shell shaped conformably to, and disposed normally in, the upper compartment, adapted to slide into and out of place via the aforementioned opening, embodying outer and inner spaced apart cup-shaped walls and a rectangular front wall between the front margins of the outer and inner walls, having the space within its walls evacuated of air, and having the inner wall thereof defining an open front storage space for articles to be refrigerated, a rectangular frame fitting removably in said opening and coacting with the front wall of the shell releasably to hold said shell in said upper compartment, a motor-compressoravances condenser-receiver unit mounted in the small sized lower compartment in the body of the cabinet, and an evaporator unit formed separately from, and independent of, the shell, disposed normally wholly within the upper portion of the aforesaid storage space in the shell, provided with releasable mounting means therefor, embodying an evaporator coil, having the ends of the coil connected respectively to the receiver and the suction side of the compressor by ilexible tubes, and adapted when the door is out or its closed position and after release of its mounting means and removal of said rectangular frame to be removed through the open front of said storage space in order to permit the shell to be removed from the cabinet via the opening in the front portion of the body.

3. A mechanical refrigerator' comprising a vertically elongated cabinet in the form of a hollow body consisting of a pair of spaced apart sides with inwardly extending anges along their front margins, a back between the rear margins of the sides and a top with a depending frange along its front margin, having the interior thereof divided into a large sized upper compartment and a small sized lower compartment, and embodying in its front portion a full sized opening leading to the upper compartment, and a door hinged to one of the sides of the body and adapted to swing into and out of a closed position wherein it closes the opening, a hollow open front hermetically sealed cup-shaped shell shaped conformably to, and disposed normally in, the upper compartment, adapted to slide into and out of place via the aforementioned opening, embodying outer and inner spaced apart cup-shaped walls and a rectangular front wall between the front margins of the outer and inner walls, having the space within its wall evacuated of air, and having the inner wall thereof dening an open front storage space for articles to be refrigerated, a rectangular frame tting removably in said opening, coacting with the front wall of the shell releasably to hold said shell in the upper compartment, and having the side and upper portions of its outer margin fitting normally against and connected removably to, said flanges, a motorcempressor-condenser-receiver unit mounted in the small sized lower compartment in the body of the cabinet, and an evaporator unit formed separately from, and independent of, the shell, disposed normally wholly within the upper portion of the storage space in the shell, provided with releasable mounting means therefor, embodying an evaporator coil, and having the ends of the coil connected respectively to the receiver and the suction side of the compressor by flexible tubes which for the most part are disposed between one of the side portions of the shell front wall and the adjoining side portion of the frame, said evaporator unit being adapted when the door is out of its closed position and after release of its mounting means and removal of said rectangular frame to be removed through the open front of said storage space in order to permit the shell to be removed from the cabinet via the opening in the front portion of the body.

4. A mechanical refrigerator comprising a cabinet in the form of a hollow body consisting of spaced apart sides, a back and a top, having the interior thereof divided into an upper compartment and a lower compartment, and embodying in its front portion a full sized opening leading to the upper compartment, and a door hinged to one of the sides of the body and adapted to swing into and out of a closed position wherein it closes the opening, a hollow open front hermetically sealed cup-shaped shell shaped conformably to, and disposed normally in, the upper compartment, adapted to slide into and out of place via the aforementioned opening, embodying outer and inner spaced apart cupshaped walls and a rectangular front wall between the front margins of the outer and inner walls, having the space within its walls evacuated of air, having the inner wall thereof dening an open storage space for articles to be refrigerated, and provided with vertically extending sleeves the end portions of which extend through aligned holes in the upper portions of the outer and inner Walls rif the shell, a n10tor-compressor-condenser-receiver unit mounted in the lower compartment in the body of the cabinet, and an evaporator unit formed separately from, and independently of, the shell, disposed normally wholly within the upper portion of the storage space in 'the shell, embodying an evaporator coil, having the ends of the coil connected respectively to the receiver and the suction side of the compressor by flexible tubes, and mounted removably in place by way of bolts that extend slidably through said sleeves, said evaporator unit being adapted when the door is out 0f its closed position and after removal of the aforesaid bolts to be removed through the open front of said storage space in order to permit the shell to be removed from the cabinet via the opening in the front portion of the body.

5. A mechanical refrigerator comprising a cabinet in the form of a hollow body consisting of sides, a baci; and a top, having the interior thereof divided into a pair of compartments, and embodying in its front portieri a full sized opening leading to one of the compartments, and a hollow door hinged to one of the sides of the body so that it is capable of swinging into and out of a ciosed position wherein it closes the opening, and having an opening leading to its interior, a hollow hermetically sealed shell formed wholly independently of the door, disposed normally in the interior of the door, embodying outer and inner Walls and a continuous side wall between the margins of the outer and inner walls, adapted to be inserted into and out of place through the second mentioned opening, and having the space within its walls evacuated of air, a motor-compressor-condenser-receiver unit mounted in the other compartment in the body of the cabinet, and an evaporator unit mounted in said one compartment, embodying an evaporator coil, and having the ends of the coil connected respectively to the receiver and the suction side of the compressor.

6. A mechanical refrigerator comprising a cabinet in the form of a hollow body consisting of spaced apart sides, a back and a top, having the interior thereof divided into an upper compartment and a lower conipartmcnt, and embodying in its front portion a full sized opening leading to the upper compartment, and a hollow door hinged to one of the sides of the body, adapted to swing into and out of a closed position wherein it closes the opening, and having a marginal opening leading to its interior, a hollow open front hermetieally sealed cupshaped shell shaped conformably to, and disposed normally in, the upper compartment, mounted so that it is slidable into and out of place via the opening in the front portion of the body, embodying outer and inner spaced apart cup-shaped walls and a rectangular front Wall be tween the front margins of the outer and inner walls, having the space within its walls evacuated ot air having the inner wall thereof deiining an open front storage sp: for articles to be refrigerated, a hollow hermetieally sealed shell formed wholly independently of the door, disposed normally in the interior of the door, embodying outer and inner walls and a continuous side wail between the margins of the outer and inner walls, adapted to bc ink serted into and out of place through the second m" 1- tioned opening, and having the space within its evacuated of air, a motor-compressor-condenser-r unit mounted in the lower compartment in the body of the cabinet, and an evaporator unit formed separately from, and independent of, the saell, disposed normally wholly within the upper portion of the storage space in the shell, provided with releasable mounting means therefor, embodying an evaporator coil, having the ends of the coil connected respectively to the receiver and the suction side of the compressor by flexible tubes, and adapted 9 when the door is out of its closed position and after release of its mounting means to be removed through the open front of said storage space in order to permit the shell to be removed from the cabinet via the opening in the front portion of the body.

References Cited in the le of this patent UNITED STATES PATENTS Oswald Nov. 11, 1924 Hull June 22, 1937 Lodwig Mar. 28, 1944 Clar Apr. 24, 1951