Compressor lubricating oil heater control
AssigneeCarrier Corporation
InventorsThomas L. Apaloo, Wayne H. Garside, Isaac Berger
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Abstract
A control for selectively energizing a heater provided to raise the temperature of lubricating oil of a compressor employed in a refrigeration unit. The control includes a thermostatically operated switch provided to sense a temperature indicative of lubricating oil temperature. The switch connects the heater to a source of electrical energy when the sensed temperature falls below a predetermined value and the compressor is inoperable. When the compressor is operable, the heater is rendered inoperable irrespective of the sensed temperature.
Claims5
A control for selectively energizing a heater provided to raise the temperature of lubricating oil of a compressor employed in a refrigeration unit comprising:
- means to provide electrical energy to said heater;
- and
- thermostatically operated switch means associated with said heater for selectively connecting said heater to said source of electrical energy, said switch means being responsive to the temperature of the ambient to connect said heater to said source of electrical energy when the sensed temperature is below a predetermined level and the compressor is deenergized, with said switch means disconnecting said heater from said source of electrical energy when the sensed ambient temperature exceeds said predetermined level or when said compressor is energized regardless of the ambient temperature.
Dependencies are inferred from the claim text.