US1330458A - Refrigerator-machine - Google Patents

Description

W. YOUNG. REFRIGERATOR MACHINE. APPLICATION FILED 0014,1911.

Patented Feb. 10, 1920.

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awuewtoz WILLIAM YOUNG, OF TAdOMA, WASHINGTON.

REFRIGERATOR- MACHINE.

Specification of Letters Patent.

Patented Feb. to, 1920.

' Application filed October 4, 1917. Serial No. 194,643.-

To all whom it may concern: 7

Be it known that I, ,WILLIAM YOUNG, a citizen of the United States, residing at the city of Tacoma, in the county of Pierce and State of Washington, have invented new and useful Improvements in Refrigerator- Machines, of which the following is a specification.

My invention relates to improvements in refrigerator machines in which ammonia gas is put under pressure, and from'which ammonia liquid is derived and distributed to expansion coils for refrigerating purposes.

The objects of my invention are, first, to provide a safety valve by-pass between the high and low pressures within the cylinder of the compressor, and thus automatically control the pressure within the condenser tank;-second, to provide a by-pas's between the crank case and cylinder of the compressor whereby the piston will be lubricated and the valves sealed automatically; and,

' third, to construct a small refrigerator mamechanism shown in the accompanyingchine suitable for residences and small restaurants as well as for larger establishments. I attain these objects by means of the drawing exhibited in one figure and described withreference to the numerals thereon.

My improved refrigerator machine corn Y prises a compressor having a cylinder 1. in

which is operated a piston 2, by the crank 3 which is driven by an electric or other motor power operating the belt 4 on the wheel 5..

The compressor machine is oper. d in conjunctionewith a condenser tank in which are new improvements describedunder a separatepatent application. The required amount of liquid ammonia is put into the condenser-tank 6 with the expansion coils .in vacuum. Gas of ammonia is then compressed into the condenser tank 6 till the re-' .quired pressure is obtained to fill theexpansion'coils with ammonia fgas, after which the compressor machlne w1ll work automat1cally.

In the automatic refrigerating process ofv the machine, the ammonia passes from the condenser tank 6 throughthe'outlet pipe 7 from which it'is sprayed into gas and intothe'expansion coils of the refrigerating systern. The return from the expansion coils is received into the compressor cylinder 1 through the inlet pipe 8 whence it is again forced into the condenser tank 6 through the denser tank 6, after which it will continue to circulate through the condenser tank and till the pressure is lowered within the conthe expansion coils system. By means of this spring actuated by-pass valve 11, it will be seen that a uniform pressure is kept within the'tank 6 at all times and all danger of explosion is prevented without the care of an operator.

The case 13 in which the crank 3 revolves is designed to be filled with oil to a height above thecrank shaft 14 to lubricate the .bearings 'and to prevent the escape o'f gas around the crank shaft. The action of the crank so agitates the .oil. that a spray is formed thereby. A by-pass 15 in the side of the compressor cylinder allowstheOil spray to be, forced into the cylinder 1' above to lub-ricate thepiston 2 and; seal the compressor valves. It will be observed this by-pass port opens into the cylinder l'just above the piston head when it is at the lowest point and a pressure is thus formed withinthe crank 7 case 13., This pressure .will cause the oil spray to dash through by-pass 15 and into the cylinder -1 as the piston 2 completes its return stroke, as shown in the drawing. This oil spray mixes with the ammonia gas and-is forcedtherewith into .the condenser tank 6 where it is collected by an oiI'sep-ara- .tor inthe bottom of the tank. By means of pipe 16, controlled by valve 17, th'e. oil thus collected is redrawn into the crank case 13 ..to be againused. The sight feed glass 18 reveals the amount and character of voil within the crank case 13;

It-is to be observed that instantly after the pressure within the crank case 13 is reduced below the pressure within the suction chamber of the cylinder, there is created a back-suction through the by-pass 15 into the crank case. This back-suction removes any oil that may have settled on the lower head of the piston 2 from the ammonia gas while within the suction chamber and deposits it within the crank case 13, thus care of an attendantoperator.

keeping a working supply of oil therein in addition to the oil returned thereto from the condenser 6. Another improvement to be observed is in the outlet valve 19. This valve is provided with duplex springs. 2-0 and 21 to relieve the strain on the cylinder head 22 and prevent breaking it out.

It will be observed the upper part of the compressor cylinder is surrounded by a water jacket 23. The water pipe 24 supplies water at the bottom of the condenser tank 6 and passing up through internal pipes to the top and out through the connecting pipe 25 into the water jacket 23. The outlet valve 26 permits the Water to be changed when desired to keep the tank 6 and cylinder 1 cool. The pipe extension 27 is designed for a pressure gage to be attached thereto to complete the refrigerating machine. With the improvements herein described I provide a compressor for a refrigerating machine that will operate automatically and that may be run continuously without the The entire invention is so compact that a machine of der, the pressure within said discharging and upper head forming a suction chamber and a discharging chamber Within said cylincham'ber controlled by a spring actuated alve by pass therefrom to said suction chamber, said piston operated by a motor driven crank, said crank confined within a lubricating crank case, a by-pass between said crank case and saidsuction chamber, the pressure Within said crank case made by the return stroke of said piston relieved by said by-pass discharging oil spray therefrom into said suction chamber and the liquid oil gathered onthe lower head of said iston drawn therefrom into said crank case by the back-suction through said by-pass stantly following the discharge of said oil spray from said crank case, as'described and -for the purposes set forth.

WILLIAM YOUNG.

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