Abstract:
Two motor-compressor units of the vertical shaft type are housed in spaced parallel relation in a common sealing housing. A hollow chambered partition extends transversely within the housing between the units and is attached to the side walls and top wall but spaced from the bottom wall. The partition functions as a suction gas header, substantially isolates the suction areas above the oil level, and stiffens the housing walls, inhibiting resonant vibration.
Abstract:
The disclosure describes a refrigerant compressor of the type driven by a motor capable of operating at a low speed and a high speed, the motor including first, second and third stator coils. First, second and third temperature sensors are located adjacent the first, second and third stator coils, respectively, for detecting any change in temperature of the coils. If the temperature of any of the stator coils exceeds a predetermined value, a control device operates a switch in a pilot circuit that turns off the motor before damage from excessive heat can occur. A unique contactor assembly utilizing both electrical and mechanical interlocks interconnects the stator coils to provide two speed operation.
Abstract:
In a refrigeration system comprising a compressor, expansion means, an evaporator and a condenser, the improvement comprising a normally open, spring-loaded valve positioned so that when the compressor is not operating a passage is provided between the compression chamber and the inlet to the compression chamber, and when the compressor is operating the passage is closed.
Abstract:
A method is disclosed for controlling the operation of a two speed electrical motor used to drive a hermetic refrigerant compressor so as to attain an overall motor compressor efficiency at low speed operation which is equal to or greater than the overall motor compressor efficiency at high speed operation.
Abstract:
The disclosure describes a refrigerant compressor of the type driven by a motor capable of operating at a low speed and a high speed, the motor including first, second and third stator coils. First, second and third temperature sensors are located adjacent the first, second and third stator coils, respectively, for detecting any change in temperature of the coils. If the temperature of any of the stator coils exceeds a perdetermined value, a control device operates a switch in a pilot circuit that turns off the motor before damage from excessive heat can occur. A unique contactor assembly utilizing both electrical and mechanical interlocks interconnects the stator coils to provide two speed operation.
Abstract:
A refrigeration compressor including a sealed housing with a stationary cylinder block having an annular array of axial cylinders, pistons reciprocable in the cylinders, a rotatable cam for reciprocating the pistons, an annular inlet channel around the cylinder block, intake valving for admitting fluid from the inlet channel to the cylinders on the intake strokes of the pistons, outlet valving for discharging high pressure fluid from the cylinders on the compression strokes of the pistons, and a baffle mounted on the end of the cylinder block over the outlet valving. The compressor is utilized in a system including an electric motor in the housing connected for rotating the cam, a desuperheater communicating with high pressure vapor from the outlet valving for cooling the vapor, means for supplying cooled vapor from the desuperheater to the housing for cooling the electric motor, a condenser for receiving vapor after circulation through the motor, an evaporator communicating with the condenser, and means for supplying vapor from the evaporator to the intake valving.
Abstract:
A refrigeration unit comprising a motor compressor unit including a motor having a temperature responsive resistance element connected in series with the start winding thereof. The resistance element is disposed within a shell enclosing the motor compressor unit. Refrigerant gas contained within the shell passes in heat transfer relation with the resistance element to rapidly cool the element when the flow of current therethrough is interrupted due to the deenergization of the motor. The resistance element is thereby rapidly placed in a state to permit the flow of current therethrough to the start winding when the motor is reenergized.
Abstract:
A multi-cylinder hermetic compressor of the vertical crankshaft type has a liquid refrigerant return reservoir in the form of an upwardly-open, channel-shaped trough mounted on top of and in heat exchange relation with the annular discharge gas muffler, and is provided with oil bleed drain openings and with overflow notches, both located above the cylinder heads so that any liquid refrigerant passing downwardly through either the holes or the notches will spill onto the hot cylinder heads.
Abstract:
A HERMETICALLY SEALED COMPRESSOR COMPRISING A COMPRESSOR BODY ELASTICALLY SUPPORTED IN A SEALING CASE AN A PROTECTOR SO DISPOSED AS TO ENCLOSE THE LOWER END OF THE REVOLVING SHAFT OF AN ELECTRIC MOTOR CONSTITUTING AN ELEMENT OF SAID BODY AND PROVIDED WITH AT LEAST ONE REPULSING MEANS WHEREIN, WHEN THE REVOLVING SHAFT ROTATES ALONG THE INNER WALL OF THE PROTECTOR UPON THE HEAVY SHAKING OF THE COMPRESSOR BODY, AND THE LOWER END OF THE SHAFT IS FORCED BACK TO THE ORIGINAL POSITION OF THE PROTECTOR BY THE REPULSING MEANS, THEREBY PREVENTING SAID ROTATION FROM BEING CARRIED TO EXCESS.