US1511376A

US1511376A - Compressor

Info

Publication number: US1511376A
Application number: US669142A
Authority: US
Inventors: Charles C Spreen
Original assignee: Kelvinator Inc
Current assignee: Kelvinator Inc
Priority date: 1923-10-17
Filing date: 1923-10-17
Publication date: 1924-10-14
Anticipated expiration: 1941-10-14

Description

924 1151x376 Odi 14' E c. c. sPREEN .COMPRE S S OR Filed oct. 17'. 192s NVE/VTC@ Patented @cti Mi, 1924.,

frans CHARLES C. SPREEN, 0F DETROIT, MICHIGAN, ASSIGNOR -TO KELVNATOR CORPORA- TION, OE DETROIT, MICHIGAN, A CORPORATION 0F DELAWARE.

ooinraassoa.

Application ledl October 17, 1923.

To all whom t may cof/wcm:

Be it known that l, CHARLES C. SPREEN, a citizen of the United States, residing at Detroit, in the county of Wayne and State of Michigan, have invented a certain new and useful lmprovement in Compressors, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

It is advisable to provide, in compressors 4 utilized for compressing the refrigerant in a mechanical retrigerating system, some means by which oil in the refrigerating system may return to the crank case of the compressor. My invention provides an improved means for this purpose. In the drawings accompanying this specification and forming a part thereof I have shown, for purposes of illustration, one form which my invention may assume. In these drawings the single ligure represents a vertical section through a compressor embodying this illustrative form of my invention.

The compressor herein described comprises a casing 11 containing within itself a crank case chamber 12 in which is mounted a crank shaft 13 which operates, by means of a pitman 14, a piston 15 arranged to reciprocate within a cylinder 16 which is receivable within the casing 11, defines within itself a compression chamber 17, defines between itself and the casing 11 an inlet chamber 18, is provided with a suitable port 19 arranged to ai'ord communication between the inlet chamber 18 and the compression chamber 17 when the piston 15 is lowered asshown herein and is provided with a suitable outlet valve adapted to afford communication, between the compression chamber 17 and the outlet chamber 21.

It will be obvious from the above description that rotation' of the crank shaft 13 will act through the pitman 14 to operate the piston 15 within the cylinder 16 from the position herein shown to a slightly higher position wherein the port 19 is closed and thence through a series of positions to that in which the piston 15 has reached the upper limit of its travel and the Huid within the compression chamber 17 has been compressed and expelled through the outlet valve 20 into the outlet chamber 21 after which continued rotation of the crank shaft 13 will retract the piston Serial No. 669,142.

15 into the position herein shown and by uncovering the port 19 permit the introduction of a treshcharge of refrigerant from the inlet chamber 18 into the compression chamber 17.

During the operation of the compressor oil from the crank case chamber 12 is continually splashed upon the inner walls ot' the cylinder 16 and, with each stroke of the piston 15, a certain amount of this oil is carried into the compression chamber 13 and thus into the ret'rigerating system. Oil in the refrigerating system not only interferes with the proper' action of the refrigerant but also causes knocking and pounding of the compressor and accordingly it is highly desirable that any such oil be afforded an outlet through which it may escape trom the refrigerating system. rlhe embodiment of my invention herein disclosed provides this outlet by forming in the cylinder 16 adjacent the lower. edge of the inlet chamber 18 an aperture 22 connecting the inlet chamber 18 with the crank case 12. Becauseof the direction in which this aperture extends the likelihood ofoil being splashed therethrough into the inlet chamber 18 is negligible while the suction of oil vapor into the inlet chamber 18 is prevented b closing the aperture 22, as by a depen ing skirt 23 on the piston 15, whenever the port 19 is uncovered and iuid is being drawn from the inlet chamber 18 and by uncovering the aperture 22 only when the pressure within the inlet chamber 18 is suihcient to prevent any appreciable inow into the inlet chamber 18 through the aperture 22.

It will be apparent to those skilled in the art that 1 have provided an improved means for permitting oil and other foreign matter to escape from the rerigerating system. At the same time, it will be readily' apparent to those skilled in the art that the particular construction herein shown and described may be variously modified'without departing from the scope of my invention or sacricing the advantages thereof and that this disclosure is illustrative only and my invention not limited thereto.

li claim:

1. A compressor comprising a crank case chamber and an inlet chamber connected by means of a duct adapted to permit foreign matter such as oil to pass :from said inlet chamber to said crank case chamber,`

and'comprising means arranged to maintainsaid duct closed Whenever said inlet chamber is connected to the compression chamber of said compressor.`

2. A compressor provided with a crank case chamber and -an inlet chamber and a compression chamber and with a duct adapted to permit the passage from said inlet chamber to said crank casechamber of foreign matter such as oil, and comprising means arranged to maintain said duct closed Whenever said inlet chamber is in communication With said compression cham.

ber.

3. A compressor provided with a crank case chamber and an inlet chamber and a compression chamber and With a duct adapted to permit the passage from1 said inlet chamber to said crank case chamber of foreign matter such as oil, and comprising a piston cooperating With said compression chamber and adapted to close said duct during a portion of its stroke.

4. A compressor provided with a crank case chamber and an inlet chamber and a compression chamber and with a duct adapted to permit the passage from said inlet chamber to said crank case chamber of foreign matter such as oil, and comprising a piston operating in lsaid compression chamber and adapted to closesaid duct Whenever said compression chamber is in communication' With said inlet chamber.

5. A compressor providedwith a crank case chamber and an inlet chamber and a compression chamber and with a duct adapted to permit the passage from Said inlet chamber to said crank case chamber of foreign matter such as oil, and comprising a piston operating Within said compression chamber, adapted to cover and uncover a port connecting said compression chamber With said inlet chamber, and arranged to maintain said duct closed whenever said port is open. f

In testimony whereof, I hereunto affix my signature. l

CHARLES o. SPREEN.