Importance

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Abstract

A method of operating a refrigeration unit to improve the uniformity of temperature distribution in a conditioned space, with the refrigeration unit including a refrigerant compressor and an evaporator fan driven at a selectable one of high and low operating speeds by a prime mover arrangement. The method includes the step of periodically operating the compressor and evaporator fan at the higher of the two operating speeds, notwithstanding a set point temperature control algorithm calling for operation of the compressor at the lower of the two speeds. When the refrigeration unit is operating in a continuous mode, the value of a constant entered into an operating program by the user determines the minimum number of minutes of each hour the prime mover should be forced to operate in the higher speed mode. When the refrigeration unit is operating in a cycling start-stop mode, the value of the constant entered into the operating program by the user determines which operating cycles are to be performed with the prime mover in the high speed mode, notwithstanding a set point temperature control algorithm calling for the low speed mode.

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First Claim