White Consolidated Industries, Inc.

Other

White Consolidated Limited

Jack F Fritchman

A single horizontal cylinder, small refrigeration compressor has a lubrication arrangement which includes a recess on the cylinder block above the cylinder bore which collects oil that drains from the lower end of the motor. A supply passage extends downward from said recess and opens into the cylinder bore near its midpoint. The piston has an elongated shallow groove on the interior between head and skirt lands which is connected to the passage during a major portion of the piston stroke to receive oil from the recess. Drain passage means are provided on the piston to allow oil to flow out of the groove at a lesser rate than it is supplied by the supply passage from the recess.

Hermetic refrigeration compressor

A hermetic reciprocating piston refrigeration compressor utilizes separate cylinder head members for the discharge and suction plenum chambers adjacent the discharge and suction valves. The two cylinder heads extend over substantially the entire area of the valve plate at the end of the cylinder carrying the valves. A discharge cylinder head is formed of metal while the suction cylinder head is formed of a plastic material of low thermal conductivity to minimize heat transfer between the discharge and suction plenums. The suction cylinder head is formed as a unitary member to include also passages and a portion of the suction muffler and is secured in place by a single fastening member.

Compressor head and suction muffler for hermetic compressor

A hermetic refrigeration compressor has a flat valve plate closing off a cylinder bore. The valve plate has an elongated recess on the outer side around the discharge port and a discharge valve assembly, comprising a flat reed valve and backing spring, fits within the recess beneath an overlying valve stop which engages the bottom of the recess at each end. The recess, the reed valve, the backing spring, and the valve stop are so configured that they can be assembled only in the correct configuration. The valve stop is held in place by an arcuate retaining spring having ends engaging notches in the valve plate and a projecting boss on a cylinder head defining a discharge valve plenum engages the retaining spring to press the spring and the valve plate into position within the recess to retain all of the parts in operating position.

Compressor discharge valve assembly

A suction valve for a small refrigeration compressor is in the form of a thin sheet metal reed having a sealing portion adapted to make sealing contact with a valve seat around the suction port on a valve plate. The valve reed is formed from a valve sheet by an outline defining cut so that the valve reed is integral with the sheet. The valve reed has a reduced width neck portion and in this neck portion the material is plastically deformed along a bend line so that in a normal unstressed condition the sealing portion of the reed is spaced away from the valve seat by a slight distance and as soon as the piston starts on the compression stroke the fluid pressure forces the sealing portion into sealing engagement to prevent back-flow through the suction port. When the piston starts the suction stroke, the biasing of the valve reed causes the sealing portion to move out of engagement with the valve seat before there is a substantial pressure differential across the suction valve. The compressor also has a reed-type discharge valve in which the valve head is normally inclined to the valve seat while making contact with the seat only at one point at the side of the valve head.

Reed valve for refrigeration compressor

A small, single cylinder, hermetic refrigeration compressor of the fractional horsepower type has a cylinder block with a piston and cylinder at the lower end. Above the cylinder block is mounted the motor stator. A bearing hub is centrally mounted on the cylinder block, and provides a single radial bearing for the crankshaft, which extends upward through the bearing hub and has the rotor mounted on the upper end. The crankshaft is journaled directly in the bearing hub, while the thrust is taken up by a small ball bearing mounted between the rotor and an end face on the bearing hub. The thrust bearing uses a pair of flat thrust washers as races, while the balls, which are widely spaced and minimum in number, are mounted in a plastic cage.

Refrigeration compressor

A hermetic reciprocating piston refrigeration compressor has a high efficiency muffler system. The suction muffler has an inlet adjacent the refrigerant return line and is made of an insulating material. It is mounted on a pair of suction tubes secured to the cylinder head and extending into the interior of the muffler. A discharge muffler system includes a pair of large muffler chambers formed partially in a cylinder block and connected by an external transfer tube. A large straight passage connects the discharge plenum in the cylinder head with one muffler chamber, while a discharge line extends from the other muffler chamber to the exterior of the compressor casing.

Muffler system for refrigeration compressor

A discharge valve assembly for a compressor includes a valve plate having a pair of projecting guideposts. A discharge port is located in said valve plate closer to one of the posts than the other post and a stop member is mounted on the guidepost to define a stop surface spaced from the surface of the valve plate. Between the stop member and the valve plate are a flat valve reed and a bowed valve spring, and the stop surface adjacent the guidepost nearest the valve seat is spaced farther from the valve plate than the stop surface adjacent the other guidepost.

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Cullman, AL, United States of America

Jack F Fritchman