US3182902A

US3182902A - Refrigeration apparatus

Info

Publication number: US3182902A
Application number: US256685A
Authority: US
Inventors: Victor G Foris
Original assignee: Westinghouse Electric Corp
Current assignee: CBS Corp
Priority date: 1963-02-06
Filing date: 1963-02-06
Publication date: 1965-05-11
Anticipated expiration: 1982-05-11

Description

May 11, 1965 v; s. FOR l5 REFRIGERATION APPARATUS Filed Feb. '6, 1963 2 Sheets-Sheet 1 Fig-l.

mvem'o Victor G- Foris WITNESSES ATTORNEY I May 11, 1965 v. G. FORIS 2 REFRIGERATION APPARATUS Filed Feb. 6, 1963 2 Sheets-Sheet 2 Fig.2.

United States Patent 3,182,902 REFRIGERATION APPARATUS Victor G. Foris, Los Angeles, Calif., assignor'to Westinghouse Electric Corporation, Pittsburgh, Pa., a corpu ration of Pennsylvania Filed Feb. 6, 1963, Ser. No. 256,685 I Claims. (Cl. 230-235) This invention relates generally to motor-compressor units, such'as for example, those used in domestic refrigerators and air conditioners and more particularly to such units wherein the motor-compressor is resiliently suspanying drawings in which:

FIG. 1 is a vertical sectional view taken along line II of FIG. 2 showing the casing of a motor-compressor unit employing the present invention, the motor and compressor being shown in elevation and a portion thereof being broken away;

'FIG. 2 is a plan view of the motor-compressor and casing with the end cover omitted;

FIG. 3 is an enlarged, fragmentary,'vertical sectional view showing one of the supporting members shown in FIGS. 1 and 2;

FIG. 4 is a fragmentary sectional view taken along line IV-IV of FIG. 3, looking in the direction indicated by the arrows; and

FIG. 5 is a detail view similar to FIG. 4, but with the spring disassembled from the bracket.

Referring to the drawings, especially FIG. 1, there is shown a vertical shaft motor-compressor unit disposed in a fluid tight casing 11. The illustrated motor-compressor unit 10 is of the reciprocal type having its shaft vertically disposed. As the motor-compressorunit may be of any type, further detailed description thereof is deemed unnecessary.

The casing 11 comprises atubular wall 12 having a circular wall 13 closing its lower end and a circular cap 14 for closing the upper end. Outwardly extending flanges 15 are located at the outer surface of the wall 13, and are provided with holes 16 through which bolts or other attaching devices may be inserted for securing the casing 11 to a suitable support.

Referring now to FIG. 2, the motor-compressor unit 10 is shown supported in the casing 11 by a plurality of spring assemblies 17, each disposed such that the axis 18 of the spring 19 is located radially with respect to the casing.

In the present embodiment, three spring assemblies 17 are employed in supporting the unit 10, however, it will be appreciated that the number of assemblies used could vary with the type of spring and size of the unit to be sup- 1 ported.

For a more detailed description of the spring assembly 17, reference should be had to FIG. :3 wherein a spring assembly is shownconnecting the motor compressor unit 10 to the tubular wall 12 of the casing 11. In the embodiment shown the spring assembly 17 comprises a conical-shaped helical spring 19 and a spring-supporting bracket 20. The conical spring 19 has a straight portion 19a formed at the inner end thereof and an outer end 3,182,902 Patented May 11, 1965 wardly and is so constructed as to provide an interference fit with the outer end coil 21 when the latter is positioned therein.

A circular hole 24, formed in the unit 10, is threaded internally, and so disposed asto threadedly receive the straight portion 19a of the spring 19.

With the cap 14 removed from the casing 11, the motorcompressor unit 10 is assembled in the casing in the following manner. The brackets 20 are located on the inside of the tubular wall 12, and may be attached by spot welding or any other suitable method. While the unit 10 is located outside the casing 11, straightportions 19a of the springs 19 are screwed into the internally threaded holes 24. The straight portion 19a of each spring 19 may be of a length slightly less than the depth of the hole 24 so that it need not bottom in the hole.

The unit 10 may now be lowered through the top opening in the casing 11, to a position where each spring 19 is radiallyaligned with, and disposed above, a bracket 20. By further lowering the unit 10 into the casing 11, while guiding the end coils 21 into the pockets 23, the unit will come to rest with each coil 21 positioned in a corresponding pocket as shown in FIGS. 2 and 4. The unit 10 is thereby attached to the casing 11 solely by the springs 19, each having its inner end substantially fixed against rotation by engagement in the threaded hole '24, and its outer end substantially fixed against rotation by engagement of its end coil 21 in the pocket 23 of the corresponding bracket 20.

It will be apparent that when subjected to the weight of the motor'compressor unit, the springs 19 will be deflected or deformed downwardly, as shown in FIGS. 1 and 3, but will maintain the unit in spaced relation to the casing 11 at the bottom as well as at the sides. The springs will deflect circumferentially, within limits, to permit limited rotation of the unit relative to its casing at starting and stopping of the motor. v

The use of a small diameter outermost coil at 21 serves to space the adjacent largest coil of the. conical spring a sufficient distance from the casing 12 to insure that the largest diameter coil does not engage the casing upon occurrence of maximum deflection of the spring, which occurs upon starting of the motor. Such contact of the spring with the casing could, if permitted, produce an objectional sound.

The assembly is completed by the addition of circular cap 14, which may be secured by welding or other fastening means, to provide a fluid tight casing.

It will be recognized that the objects of the invention have been achieved by providing an improved arrangement for resiliently mounting a motor compressor unit in a casing, which arrangement comprises radial spring supports, having their ends substantially fixed against rotation.

Further, the spring assemblies are easy and inexpensive to manufacture and are so designed as to facilitate mounting of a motor-compressor unit in a casing.

While the invention has been shown 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 is claimed is:

1. A hermetically sealed compressor comprising a cylindrical, fluid tight casing having a vertical tubular wall,

a vertical shaft motor-compressor unit disposed therein,

and means for supporting said unit in said casing,

said means including a helical spring disposed between said tubular wall and said unit,

said spring having its axis located radially with respect to said tubular wall and having one end substantially fixed against rotation at said unit,

and a bracket for supporting the opposite end of said spring, said bracket being attached to the interior of said tubular wall, and having a vertical facing pocket adapted to receive a coil of said spring in interference fit, whereby said spring is substantially fixed against rotation, said spring and said bracket thereby serving to resiliently support said unit in the vertical direction in saidcasingi 2. A hermetically sealed compressor comprising a cylindrical, fluid tight casing having a vertical tubular wall,

a vertical shaft motor-compressor unit disposed therein,

and means for supporting said unit in said casing,

said means including a plurality of helical springs disposed between said tubular wall and said unit,

said springs having'their axes located radially with respect to said tubular wall,

a plurality of circular holes in said unit, said holes having helical grooves formed therein for threadedly receiving one end of said springs,

and a plurality of brackets for supporting-the opposite ends of said springs said brackets being attached to the interior of said tubular wall, and each having a vertically facing pocket adapted to receive a coil of said springs whereby said springs are substantially fixed against rotation, said springs and said brackets thereby serving to resiliently support said unit in the vertical direction in said casing.

3. A hermetically sealed compressor as set forth in claim 2, further characterized by said helical springs being conical in shape and having straight portions'formed opposite the base ends,

said straight portions being received in said circular holes in said unit.

4. A hermetically sealed compressor comprising a cyflindrical, fluid tight casing having a vertical tubular wall,

a vertical shaft motor-compressor unit disposed therein,

and means including a plurality of helical springs disposed between said tubular wall and said unit,

said springs having their axes located radially with respect to said tubular wall,

a plurality of circular holes in said unit, said holes having helical grooves formed therein for threadedly receiving the inner end of said springs,

a coil at the outer end of said springs formed of lesser diameter than an adjacent coil,

and a plurality of brackets for supporting the outer ends of said springs, said brackets being attached to the interior of said tubular wall, and each having a vertically facing pocket adapted to receive said outer end coil of said springs, whereby said springs are substantially fixed against rotation, said springs and said brackets thereby serving to resiliently support said unit in the vertical direction in said casing.

5. A hermetically sealed compressor as set forth in claim 4, further characterized by said helical springs being conical in shape and having straight portions formed opposite the base ends and said smaller diameter coils formed at the base ends,

said straight portions being received in said circular holes in said unit.

= References Cited by the Examiner UNITED STATES PATENTS 2,233,082 2/41 Kucher 230-235 X 2,349,845 5/44 Cody 230-235 X 2,417,037 3/47 Zuckerman 248-3581 X 2,509,803 5/50 Booth 267-20 X 2,540,062 1/51 Touborg 230-232 X 2,741,425 4/56 Scheldorf 230-232 2,772,047 1l/g6 Sonnberger 230-232 2,905,372 9/59 La Flame 230-232 3,089,639 5/63 Hannibal 230-235 FOREIGN PATENTS 626,107 3/ 35 Germany.

847,752 7/49 Germany.

877,618 9/61 Great Britain.

LAURENCE v. EFNER, Primary Examiner.

Claims

1. A HERMETICALLY SEALED COMPRESSOR COMPRISING A CYLINDRICAL, FLUID TIGHT CASING HAVING A VERTICAL TUBULAR WALL, A VERTICAL SHAFT MOTOR-COMPRESSOR UNIT DISPOSED THEREIN, AND MEANS FOR SUPPORTING SAID UNIT IN SAID CASING, SAID MEANS INCLUDING A HELICAL SPRING DISPOSED BETWEEN SAID TUBULAR WALL AND SAID UNIT, SAID SPRING HAVING ITS AXIS LOCATED RADIALLY WITH RESPECTT TO SAID TUBULAR WALL AND HAVING ONE END SUBSTANTIALLY FIXED AGAINST ROTATION AND SAID UNIT, AND A BRACKET FOR SUPPORTING THE OPPOSITE END OF SAID SPRING, SAID BRACKET BEING ATTACHED TO THE INTERIOR OF SAID TUBULAR WALL, AND HAVING A VERTICAL FACING POCKET ADAPTED TO RECEIVE A COIL OF SAID SPRING IN INTERFERENCE FIT, WHEREBY SAID SPRING IS SUBSTANTIALLY FIXED AGAINST ROTATION, SAID SPRING AND SAID BRACKET THEREBY SERVING TO RESILIENTLY SUPPORT SAID UNIT IN THE VERTICAL DIRECTION IN SAID CASING.