초록 ▼

The present invention continuously speed-controls an electric motor for driving a compressor for refrigerant compression such that the compressor is driven in its maximum rpm if the difference (temperature deviation) between a target cooling temperature and an actual temperature is greater than a fi

The present invention continuously speed-controls an electric motor for driving a compressor for refrigerant compression such that the compressor is driven in its maximum rpm if the difference (temperature deviation) between a target cooling temperature and an actual temperature is greater than a first predetermined value, the compressor is stopped if the temperature deviation is less than a second predetermined value, and the compressor is speed-controlled by a digital control signal if the temperature deviation is between said first and second predetermined values.

대표청구항 ▼

A system of controlling a refrigerator temperature comprising: means for setting a target temperature; means for detecting an actual temperature; temperature deviation detecting means for determining as a temperature deviation the difference between said target temperature and said actual temperatur

A system of controlling a refrigerator temperature comprising: means for setting a target temperature; means for detecting an actual temperature; temperature deviation detecting means for determining as a temperature deviation the difference between said target temperature and said actual temperature; a compressor driver capable of continuously varying the rpm of a compressor for refrigerant compression; and a controller for issuing to said driver a speed command covering the range from minimum to maximum rpm in accordance with a temperature deviation detected by said temperature deviation detecting means; wherein D0 signifies a temperature deviation of zero, +Di signifies any value positive with respect to said D0 (i=1, - - - , n, and +Di-10 (j=1, - - - , m, and -Dj-1DD0 by a speed change width corresponding to the absolute value of said temperature deviation if said time period is equal to or greater than said predetermined value D0; whereby the rpm of said compressor can be controlled in a desired manner.