Apparatus for regulating compressor cycles to improve air conditioning/refrigeration unit efficiency
AssigneesIntellidyne, LLC, Harvey Schwartz
InventorJack Hammer
Life of this patent
Estimating the term…
Abstract
To regulate a cooling system operation, a value from an energy value sensor such as a thermostat or pressuretrol is sensed and, if the value warrants a call for compressor operation, the call is made. The last compressor off-call-time is stored in memory. If the off-call-time is less than a short-cycle interval, the compressor is delayed to allow substantial compressor pressure equalization. Compressor operation is delayed further for a percentage of the off-call-time. compressor on-time is also measured and, if on for a substantial interval, the compressor is given a short rest. Improved efficiency results.
Claims19
A method of regulating a cooling system operation comprising the steps of:
- measuring an off-call-time of a compressor control circuit;
- sensing a compressor call from a energy value sensor;
- and
- preventing the operation of the compressor for an interval which is a value derived from the measured off-call-time.
A method of regulating a cooling system operation comprising the steps of:
- monitoring a value from an energy value sensor;
- determining from said value whether the value warrants a call for compressor operation;
- generating a call when warranted;
- measuring an off-call-time prior to said call from a previous compressor shut down;
- storing the off-call-time last measured in a memory;
- delaying operation of the compressor if the off-call-time is less than a short-cycle interval which short-cycle interval would allow substantial compressor pressure equalization;
- calculating a percentage of the off-call-time;
- preventing compressor operation for a delay equal to the percentage;
- operating the compressor subsequent to the delay;
- measuring an on-cycle of compressor operation time;
- interrupting operation of the compressor after the on-cycle has extended for a substantial interval sufficient to bring a space to an equilibrium temperature;
- and
- preventing operation of the compressor for a predetermined rest interval, which rest interval is short but sufficient to allow:
- compressor equalization,
- compressor motor cooling, and
- improving efficiency by saving energy during the rest interval,
- during which rest interval a thermal inertia of any cooled objects and fluids in the space substantially maintains a temperature in the space.
In a cooling system comprising a compressor, a cooling media, and a heat exchanger, an improvement comprising:
- an energy value sensor;
- and
- means:
- for monitoring the energy value sensor,
- for controlling the compressor,
- for determining the thermal load on the cooling system by measuring an off-call-time of a compressor control circuit,
- for receiving a compressor call from the energy value sensor, and
- for preventing the energy value sensor from running the system compressor for an interval which is a value derived from the measured off-call-time.
Dependencies are inferred from the claim text.