Dual capacity compressor with reversible motor and controls arra

Details Dual capacity compressor with reversible motor and controls arra Dual capacity compressor with reversible motor and controls arra

1979-03-02

1980-12-02

Freeh, William L.

Pumps

Reverse flow with unidirectional drive or unidirectional...

74571, F04B 3500, F04B 4900, F16H 2120, F16C 328

Patent

active

042368740

ABSTRACT:
A hermetic reciprocating compressor such as may be used in heat pump applications is provided for dual capacity operation by providing the crankpin of the crankshaft with an eccentric ring rotatably mounted thereon, and with the end of the connecting rod opposite the piston encompassing the outer circumference of the eccentric ring, with means limiting the rotation of the eccentric ring upon the crankpin between one end point and an opposite angularly displaced end point to provide different values of eccentricity depending upon which end point the eccentric ring is rotated to upon the crankpin, and a reversible motor in the hermetic shell of the compressor for rotating the crankshaft, the motor operating in one direction effecting the angular displacement of the eccentric ring relative to the crankpin to the one end point, and in the opposite direction effecting the angular displacement of the eccentric ring relative to the crankpin to the opposite end point, this arrangement automatically giving different stroke lengths depending upon the direction of motor rotation. The mechanical structure of the arrangement may take various forms including at least one in which any impact of reversal is reduced by utilizing lubricant passages and chambers at the interface area of the crankpin and eccentric ring to provide a dashpot effect.
In the main intended application of the arrangement according to the invention, that is, in a refrigerating or air conditioning system, it is desirable to insure a delay during reversal of the direction of compressor operation. A control arrangement is provided in which the control system controls the direction of motor operation in accordance with temperature conditions, the system including control means for effecting operation in a low capacity direction or alternatively in a high capacity direction in response to one set, and another set, respectively, of temperature conditions and with timer means delaying a restart of the compressor motor for at least a predetermined time in response to a condition of the control means operative to initiate a change in the operating direction of the compressor when it restarts.

REFERENCES:
patent: 1565819 (1925-12-01), Saunders
patent: 2592237 (1952-04-01), Bradley
patent: 2892360 (1959-06-01), Egl
patent: 2943782 (1960-07-01), McGregor
patent: 3010339 (1961-11-01), Brock
patent: 3180178 (1965-04-01), Brown et al.
patent: 3259307 (1966-07-01), Ayling
patent: 3417628 (1968-12-01), Paul, Jr.
patent: 3470823 (1969-10-01), Seeger

Affiliated with

Also associated with

Rating

Dual capacity compressor with reversible motor and controls arra does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dual capacity compressor with reversible motor and controls arra, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dual capacity compressor with reversible motor and controls arra will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2282069